Since shrimp or prawn is a very delicate kind of protein, you can marinate it with just a few simple ingredients. Do not use tenderizers such as ginger or yogurt. For most Indian recipes that call for marinating the prawns, simply use salt, turmeric, red chili powder and a little lime juice. Keep in mind that the acid in the mine or lemon juice will break down the shrimp if kept for too long. Keep the marinated shrimp for mot more than 30 minutes before you cook it.