Cook the base: Prepare your rice according to package directions.
For a lighter bowl, sauté cauliflower rice in a little oil with a pinch of salt until tender.
Prep the produce: Dice the bell pepper and red onion. Mince the garlic. Rinse and drain the black beans.
If using frozen corn, thaw it briefly.
Toast the spices: In a small bowl, mix chili powder, cumin, smoked paprika, oregano, garlic powder, onion powder, salt, and pepper. Heat a large skillet over medium, add 1 teaspoon oil, and stir the spice blend for 30 seconds until fragrant. Transfer spices back to the bowl to prevent burning.
Brown the beef: Add a bit more oil if needed.
Cook the ground beef over medium-high heat, breaking it up as it browns, about 5–7 minutes. Drain excess fat if necessary, leaving just a light coating in the pan.
Build flavor: Add onion and bell pepper to the skillet. Cook 3–4 minutes until softened.
Stir in garlic and tomato paste; cook 1 minute.
Simmer with spices: Return the toasted spices to the pan. Pour in the broth and stir to coat everything. Simmer 2–3 minutes until slightly saucy and the beef tastes well-seasoned.
Add beans and corn: Stir in black beans and corn.
Warm through for 2–3 minutes. Squeeze in juice from half a lime and adjust salt and pepper.
Fresh finish: Turn off the heat and fold in chopped cilantro. Taste and add more lime if you like brightness.
Assemble bowls: Add a scoop of rice to each bowl.
Top with the beef mixture. Finish with lettuce, salsa, avocado, yogurt or sour cream, cheese, jalapeños, and hot sauce as desired.