Here's a list of my go-to recipes for easy, inexpensive hot lunches at home:
Cheesy Polenta in the crock pot:
This dish is gluten-free for those avoiding gluten, and any leftovers can be stored in the fridge then sliced and heated up in a skillet. Cheesy polenta is good both ways! Top with leftovers from the dinner before,
Breakfast casserole:
This dish is for breakfast, lunch or dinner in my house. I've altered the recipe a dozen ways, adding broccoli or spinach, substituting ground beef for sausage... but I always use a full dozen eggs.
And any other four-hour-or less-crock pot recipe from this book...
Add some veggies with yogurt dip or hummus, and lunch is served!