These are two of my favorite pantry recipes:
http://www.101cookbooks.com/archives/red-lentil-soup-recipe.html (red lentils, brown rice, stock, onion, spices, and it's awesome)
http://www.food.com/recipe/creamy-chickpea-and-tahini-casserole-56818 (my husband's favorite meal - rice, chickpeas, tahini, lemon, canned tomatoes - I usually leave out the onion).
Both of these are better leftover the next day. I usually make the soup the day before we plan to eat it. This one is also really good:
http://www.budgetbytes.com/2014/01/vegetable-polenta-casserole/. You can sub in whatever veggies are around.