Cook the rice according to package directions. Fluff with a fork and set aside.
In a bowl, combine the quartered tomatoes, chopped cilantro, and half of the red onion (about 1/2 cup chopped). Add lime juice, 1 tbsp taco seasoning, and salt to taste. Toss well and refrigerate until ready to serve.
Heat 2 tbsp olive oil in a large skillet over medium heat. Add black beans and 2 tbsp taco seasoning. Cook for 5-10 minutes, stirring occasionally, until heated through.
Heat the remaining 2 tbsp olive oil in another skillet over medium heat. Add sliced bell pepper, remaining sliced onion, and a pinch of salt. Cook for 10-15 minutes, stirring occasionally, until softened.
Add cashews, nutritional yeast, cumin, water, and salt to a blender. Blend until completely smooth. Add additional water slowly as needed until desired consistency is reached.
Divide the rice among 4 bowls. Top with seasoned black beans, fajita vegetables, pico de gallo, and cashew queso. Leftover cashew queso can be refrigerated and used for dipping or drizzling.
Finish with sliced avocado, pickled jalapeños, and a lime wedge if desired. Serve immediately.