Preheat your oven to 375°F (190°C).

In a mixing bowl, combine the cooked rice, diced bell pepper, onion, parsley, minced garlic, paprika, salt, and black pepper.

Lay the catfish fillets on a cutting board, skin side down. Spoon the filling onto the center of each fillet, then roll them up tightly, securing with toothpicks if necessary.

Drizzle olive oil in a baking dish and place the stuffed catfish rolls seam side down.

Sprinkle the lemon juice over the stuffed catfish.

Bake in the preheated oven for 25 to 30 minutes, or until the fish flakes easily with a fork.

Remove the catfish from the oven and let it rest for about 5 minutes.

Carefully remove the toothpicks and serve the stuffed catfish on a platter.