I have two little guys who are eating me out of my budget! These little monkeys are constantly hungry and seconds are always on the menu

Anyone have some healthy menu items that are filling. I serve healthy, home made meals and banana bread, muffins are getting boring for them.
I find a lot of great ideas from Deceptively Delicious cookbook like the Mac and cheese that has cauliflower in it ~ healthy and filling but again, the kids are getting tired of it and was wondering if anyone has some of their own healthy lunch ideas that I might not have thought of and can share with my crew