In a medium saucepan, bring 1.5 cups of water to a boil. Stir in the instant brown rice, cover the pot, and remove it from the heat. Let it sit for about 5 minutes, or until the rice has absorbed the water and fluffed up.
In a skillet, heat the olive oil over medium heat. Add the black beans and corn, stirring continuously, and cook until heated through, roughly 3 to 5 minutes.
Add the diced tomatoes and taco seasoning to the skillet. Mix everything well and allow it to simmer for an additional 2-3 minutes to meld the flavors together. Taste and adjust the seasoning with salt, pepper, and lime juice to your preference.
To serve, spoon a generous base of fluffy rice into each bowl. Top with the warm black bean and corn mixture, then add the diced avocado and a shower of shredded cheddar cheese. For a fresh finish, sprinkle some chopped cilantro on top if you're using it.
Serve the bowls with lime wedges on the side, encouraging everyone to squeeze lime juice over their bowls before digging in for a zesty flavor boost.
Notes
Consider using colorful bowls to enhance the visual appeal. You can also arrange toppings in sections for a more vibrant look.