Can anyone recommend the best foods to buy for student life?

I don’t want to have a refrigerator packed with frozen meals and processed foods that I have to microwave and leave to stand, I was hoping someone could help me compile a foundation shopping list, food stuffs I will always need and always use and never be wasteful. Ingredients I can use in more than one meal through the weeks I’m at university which are healthy, high in energy and low in saturated fats.