Ceviche-Marinated & Grilled Louisiana Shrimp Tacos Recipe - shrimp marinated in a mixture of tomato juice, lime juice, red onion, cilantro and chili powder. Marinate for 20 minutes and grill for 6 minutes to finish cooking. To assemble the tacos, we grilled a few corn tortillas and topped them with shrimp, sour cream, cabbage and salsa. SO good! Better than any restaurant!