I think its good to have staples! So now I'm going to list a few that I have, most of them are very cheap too!
Gluten free oats Pasta Noodles Rice Buckwheat Quinoa Lentils Hummus Beans - black, cannelini, kidney, butter Chickpeas Falafals Fruits like bananas, apples, oranges, satsumas, strawberrries and grapes Vegetables Peanut butter Rice cakes Tahini dressing (tahini, water and a little lemon juice) Gluten-free nut burgers - Example here Tomato sauces - homemade or bought Coconut milk and creamed coconut for curries Ground flax seed Gluten free tortilla wraps Nuts Nakd bars (UK) - Example here Trek bars (UK) - Example here 9 Bars (UK) - Example here
Others staples that have gluten in, Bread Tortilla wraps Pizza (homemade usually)