Rinse fish; pat dry with paper towels.
In a shallow plate, combine cornmeal and Trail Dust Southwestern Seasoning.
Brush tilapia with 1 tablespoon olive oil; coat with cornmeal mixture.
In a large nonstick skillet, heat remaining 2 tablespoons olive oil over medium-high heat. Add fillets; cook 5 minutes. Turn and cook until fish just flakes with a fork (an additional 4-5 minutes).
Divide cooked rice into 4 bowls.
Add half of a tilapia fillet to each bowl.
Top with tomato, avocado, black beans, salsa and a squeeze of fresh lime juice if desired.