You could also do Zatarain's boxed meals. There are lots of options, and they are all tasty. Each one serves 3 or 4, so after a long day of riding, cooking up half a box is probably about right. If I remember correctly, the recipe calls for hot water and a little oil, but I think the oil is only to keep it from sticking too much, so you can omit it if you are cooking in a plastic bag or if you don't mind scrubbing the pot a little more and want to save the weight.