Name: Heirloom Tomato Sandwich with Beet Whipped Feta
Prep time: 10 min
Cook time: 5 min
Total time: 15 min
Ingredients: 8 slices sourdough bread (toasted); 1 batch Roasted Beet Whipped Feta; 2 cups arugula (lightly packed); 2 large heirloom tomatoes (sliced); 1/2 cup pickled red onions (drained); freshly ground black pepper

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This Heirloom Tomato Sandwich with Beet Whipped Feta layers juicy tomatoes, peppery arugula, tangy pickled onions, and creamy feta on crisp sourdough. Ready in just 15 minutes, it’s an easy vegetarian lunch packed with fresh flavor!

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There’s nothing quite like a juicy heirloom tomato at the peak of summer, especially when it’s piled high on crisp, golden sourdough. Their vibrant colors and rich, sweet flavor make even the simplest sandwich feel extra special.

This Heirloom Tomato Sandwich takes things up a notch, with a slather of creamy beet whipped feta, a handful of peppery arugula, and a few tangy pickled red onions. Every bite has just the right mix of creamy, crunchy, fresh, and zesty flavors, plus no shortage of color!

This easy vegetarian sandwich comes together in just 15 minutes, making it perfect for a quick lunch or light dinner. Grab a few heirlooms while they’re in season, stack everything together, and dig in!

Why you’ll love this Heirloom Tomato Sandwich

It takes just 15 minutes to prepare, making it perfect for a quick and easy lunch.
No cooking is required, apart from popping the bread into the toaster.
It’s vegetarian, satisfying, and packed with fresh and colorful produce.
It uses a handful of simple ingredients, but the finished sandwich feels café-worthy.
You can easily customize it with whatever bread, greens, or toppings you have on hand.

Heirloom Tomato Sandwich ingredients

Sourdough bread provides a sturdy, flavorful base that holds up well against the creamy spread and juicy tomatoes. Pop it in the toaster before you start assembling for the best taste and texture.
Roasted Beet Whipped Feta is a must for this recipe. It gives the sandwich a creamy texture, tangy flavor, and just the right amount of earthy sweetness. Plus, its bright pink color adds a fun touch.
Heirloom tomatoes are juicy, sweet, and packed with fresh summer flavor. Of course, you can also swap in regular tomatoes, but heirloom tomatoes give this sandwich an extra something special. Slice them evenly and pat them dry before assembling to prevent a soggy sandwich!
Arugula brings a peppery flavor to balance out the sweetness of the beets and tomatoes.
Pickled red onions add tanginess, crunch, and a pop of acidity that cuts through the rich whipped feta. I always keep a jar of homemade quick-pickled onions in my fridge, which are super easy to make (just combine sliced onions with white vinegar!). However, store-bought pickled onions will also work here.
Black pepper adds a little warmth and helps bring all the fresh flavors together.

How to serve this Heirloom Tomato Sandwich

Pair it with a cup of tomato soup or vegetable soup for a cozy lunch.
Add baked chips, roasted potatoes, or sweet potato fries on the side.
Serve the sandwiches open-faced — this is great if you want something a little lighter or plan to enjoy them as an appetizer.
Enjoy alongside fresh fruit for a light and refreshing meal.
Cut them into smaller portions to serve as part of a brunch or picnic spread.

Substitutions & variations

Sourdough bread – I’m a sourdough lover, but you can use whatever type of bread you want! Swap in ciabatta, multigrain bread, focaccia, a baguette, or your favorite gluten-free bread if you prefer.
Heirloom tomatoes – Again, I think heirloom tomatoes give this recipe a fun and flavorful twist, but any ripe tomato works well here, including beefsteak, Roma, or even sliced cherry tomatoes.
Arugula – If you don’t love arugula, substitute spinach, mixed greens, microgreens, sprouts, or thinly sliced romaine instead.
Roasted Beet Whipped Feta – Regular whipped feta works if you don’t have beets. You can also make this sandwich with hummus, goat cheese, ricotta, or cream cheese for a different (but still delicious) flavor.
Add crunch – Give this sandwich a little more texture by sprinkling chopped pistachios, walnuts, or sunflower seeds over the filling before closing it up.
Sweeten it up – Drizzle on a little hot honey or balsamic glaze for a sweet-and-savory twist.
Make it heartier – If you want to make this sandwich a bit more filling, add some sliced hard-boiled eggs, crispy tofu, tempeh bacon, or white beans for extra protein.

Quick recipe tips

Use sturdy bread and toast it well to help it hold in all the fillings without getting soggy.

Be generous as you spread on the whipped feta — it’s the star of the sandwich!

Pat the tomatoes dry with a paper towel before assembling as needed, especially if you’re using very juicy tomatoes.

Step-by-step instructions

Make the whipped feta: Prepare a batch of Roasted Beet Whipped Feta according to the recipe instructions.

Toast the bread: Toast the sourdough until golden and crisp.
Assemble the sandwiches: Spread the whipped feta over each slice of toast. Top four slices with the heirloom tomatoes, arugula, pickled red onions, and a generous grind of black pepper.
Serve: Top with the remaining slices of bread and enjoy immediately.

Make ahead & storage

Want to get lunch on the table fast? Prep the ingredients for this sandwich ahead of time, then assemble just before serving for the freshest flavor and crunch!

Meal prep

Make the whipped feta: Prepare the Roasted Beet Whipped Feta up to 4 days in advance and store it in an airtight container in the refrigerator.
Prep the toppings: Slice the tomatoes up to 1 day ahead. Wash and dry the arugula, then store everything separately in the refrigerator.
Assemble later: For the best texture, toast the bread and assemble the sandwiches just before serving.

Storing leftovers

Fridge: Assembled sandwiches are best enjoyed fresh, but leftovers can be stored in an airtight container in the refrigerator for up to 1 day.
Expect some softening: The tomatoes and whipped feta will definitely soften the bread over time, so try to enjoy soon after assembling if possible.
Store components separately: If you can, store the bread, whipped feta, and toppings separately and assemble when you’re ready to keep everything fresh.

Freezing

Freeze the whipped feta only: The Roasted Beet Whipped Feta can be frozen in an airtight container for up to 2 months.
Skip freezing the sandwich: The rest of this sandwich isn’t freezer-friendly. Fresh tomatoes, arugula, and bread don’t thaw well, so it’s best to enjoy the sandwich fresh instead.

FAQ

It’s best assembled just before serving to prevent the sourdough from getting soggy. However, you can prepare the beet whipped feta and other ingredients in advance and store them separately!

Any ripe, flavorful tomatoes will work, including beefsteak, Roma, or vine-ripened tomatoes. Cherry tomatoes can also be used, but slice them in half first.

Yes, this recipe is vegetarian. Keep in mind that feta is sometimes made with animal-derived rennet, so look for a vegetarian-friendly variety if needed.

Yes! Simply swap the sourdough for your favorite gluten-free bread and double-check that the remaining ingredients are certified gluten-free if necessary.

Pair it with a simple green salad, some roasted veggies, tomato soup, fresh fruit, or a handful of chips for a balanced and complete lunch.

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Heirloom Tomato Sandwich with Beet Whipped Feta

This Heirloom Tomato Sandwich with Beet Whipped Feta layers creamy beet whipped feta, juicy heirloom tomatoes, peppery arugula, and tangy pickled onions on toasted sourdough for a fresh, colorful lunch. It's easy to make, packed with flavor, and perfect for making the most of the season!

Course Lunch, Main Course

Cuisine Mediterranean

Prep Time 10

Cook Time 5

Total Time 15

Servings servings

Calories 490kcal

Ingredients

8 slices sourdough bread toasted
1 batch Roasted Beet Whipped Feta
2 cups arugula lightly packed
2 large heirloom tomatoes sliced
1/2 cup pickled red onions drained
freshly ground black pepper

Instructions

Toast the sourdough until golden brown and crisp.
Generously spread the roasted beet whipped feta onto each slice of toast. You may have some whipped feta left over — save it for dipping, spreading on toast, or adding to salads and bowls.
Top four slices of bread with the sliced heirloom tomatoes, followed by the arugula and pickled red onions. Finish with a generous grind of freshly ground black pepper.
Close the sandwiches with the remaining slices of bread, then slice in half and serve.

Notes

Using leftovers: Depending on how generously you spread it, you may have some Roasted Beet Whipped Feta left over. Serve it as a dip with pita chips or fresh veggies, spread it onto toast or wraps, or add a spoonful to bowls and salads!