Muesli is a mix of raw grains (rolled oats...), dried fruit seeds,and nuts. My preferred brand is Bob's Red Mill Muesli. For hiking I cover premeasured muesli (1.5 cups)with warm water, reseal ziplock bag and let soak overnight. This is eaten raw with no cooking required. If using a bear bag place ziplock bag containing muesli and water in a stocking cap, or other insulation,and let soak overnight while hanging in bear bag.
Muesli is light, healthy and packs a good amount of calories per serving.