Eggs, stuffed potatoes are two examples that come to mind.
A lot also depends on: what’s on sale. Check reduced produce, e.g.; when mushrooms are on the shelf I go heavy on the mushrooms, lighter on the cheese. (And yes, I buy 5 lg. bricks of chalav Yisrael mozzarella for 5.69/lb. vs. $8 -10 for preshredded.)