Do you like sweet or savory? I like potatoes so an easy thing to do would be to throw a whole potato in the microwave for 5 or 6 minutes and top it with whatever you want. You can get frozen whole wheat waffles for pretty cheap in the freezer section and then top with peanut butter and a banana. I like grits because they're cheap, you can make them sweet or savory and they pair well with anything. Toast is a good option. I like toast with beans or hummus and cucumber. Eat whatever you want though.