I eat plenty of tinned beans, oats, rice and lentil burriots. Pasta and tomato sauce is doable too. I'm just a vegetarian but I don't eat a lot of eggs and dairy on tour. Peanut butter cooked into oats is a great way to start the day. Peanut butter and jam sandwiches are great too. Multivitamins are cheap enough too if you are worried about vitamins and minerals.