My favorite budget cutting foods:
Frozen Chicken Breast
Frozen Fish (Swai etc)
To get the most of your money, go to a budget grocery (like Aldi) or big box store (Sam's club), and stock up. If you're willing to cook and prepare your own food, it can be done pretty inexpensively. I buy some higher dollar items (avocado, grass fed beef), and keep my weekly grocery budget at/below $60.