Combine the lime juice, cumin, paprika, garlic, salt, and pepper in a large bowl. Add in the tilapia and mix until coated. Cover and place in the refrigerator to marinate for 20 minutes or so.
¼ cup lime juice, 1.5 tablespoons cumin, 1.5 tablespoons paprika, 1 tablespoon minced garlic, ½ tablespoon salt, ½ tablespoon pepper, 2 pounds tilapia fillets, cut in half
Heat the olive oil in a large skillet or casserole over medium-high heat. Add the peppers and onions and cook until they begin to thaw, about 3 minutes.