I use to cook a big breakfast (eggs, bacon, potatoes, pancakes) and dinner would be steaks or other meat on the grill with fresh vegetables. Now I precook a lot of things and just warm them on the grill. You can take some tortillas to put on the grill and roll your choice of food in it with cheese for quesadillas or burritos.
If you have electricity take slow cooker and toss stuff in at lunch to have a big dinner