Heat the oven to 425°F.
Slice the bell peppers and onion into strips, then cut the chicken thighs into strips. Wash your hands, cutting board and knife after handling the raw chicken.
Divide everything between two sheet pans, with the peppers and onion on one half of each pan and the chicken on the other half.
Drizzle the olive oil over both pans and sprinkle the chili powder, cumin, paprika, garlic powder, salt, and pepper over the chicken and vegetables. Stir everything around on the pans to coat.
Bake for about 25 minutes (20 to 35, depending on your oven), until the chicken reaches 165°F and the peppers start to char at the edges. If your pans don't fit on one rack, stagger them and swap racks halfway through.
While the pans bake, heat the rice pouch and warm the corn tortillas in a skillet.
Drizzle a few tablespoons of lime juice over the top and sprinkle with cilantro.
Serve as tacos or as bowls over the rice with leaf lettuce, with salsa, cheese and chips on the side.