Fiesta Fresh for great Mexican, breakfast, lunch, dinner with 8-10 excellent sauces/salsas (mild to HOT) 51 New Orleans Ave, one block north of Pope.  There is also a branch at Port Royal Plaza. Both have tasty generous portions and are very reasonably priced.

Harold's Diner, rated by many "Best Burger on the Island": 1/2 lb. with everything $5.75. Small place with one counter and a chance to mix with the locals. Closes mid afternoon 6 days a week and has a sign on the door; will "NEVER" open on Sunday!

Sea Shack on Pope Avenue Executive Park. Fresh fish grilled as you like it. Has some great soups which are a meal in themselves.