One of my constant easy fillers is lentils: cheap, filling, mega nutritional. I dump a bag in the crockpot with the correct quantity of water and a seasoning or two of my whim that week,(low for about 3 hours)- can be used for wraps, tacos, with rice etc....My kids use them for nachos. Tofu is excellent for stir fry and soups, stew etc....if you have not eaten it before try the extra firm .....