I carry a couple of days of "emergency" food that consists of Ramen, couscous, stock cubes and tea bags and I'll almost always have some salami, cheese, flatbread and cookies or trail mix in my handlebar bag. I eat in restaurants quite a bit and stop at a supermarket if one is on the way to the campsite to buy enough food for a single night. Water is usually the heaviest consumable that I carry and I'm obsessive about filling by water bottles whenever I can. If it's a hot day and water will be hard to find on my route I'll put 2L of soda in my saddlebag.