Rinse the fish and pat it dry with paper towels.
Rub the fish with salt and lemon juice, then let it marinate for about 15-20 minutes.
Heat the vegetable oil in a large skillet or pot over medium heat.
Add the chopped onion and cook until softened and translucent.
Stir in the minced garlic and cook for another minute.
Add the chopped tomatoes, red bell pepper, and green bell pepper. Cook until the vegetables are tender and the tomato starts to break down.
Stir in the ground paprika, black pepper, and salt. Mix well.
Place the marinated fish into the skillet with the vegetable mixture.
Cook for about 5-7 minutes on each side, or until the fish is cooked through and flakes easily with a fork.
Garnish with chopped cilantro or parsley before serving.
Enjoy your meal!