This simple and classic recipe for hash brown potato casserole is perfect for brunch or a last minute supper. It is very simple to make, and odds are you probably have the ingredients in your pantry, freezer, and fridge. This recipe can be modified to meet your tastes. Use a different flavor of soup; use different vegetables or a different kind of cheese. It would be delicious with havarti or swiss cheese, or try using colby, cojack, or provolone. Add some garlic or some chopped zucchini or yellow summer squash, or add some cooked asparagus or green beans. The proportions are fluid too; you can add less milk or more cheese if you like the casserole to have more body or more cheesiness. And you can use shredded hash brown potatoes or the cubed type. In fact, if you feel like doing a bit more work, you can shred your own potatoesWe have often made this recipe using leftover grilled sausages, or little breakfast sausages that we have cooked and drained first. It's also delicious with cooked bulk sausage or hamburger. Or try using leftover ham after christmas or easter dinner. Serve this recipe with some cold orange juice, hot coffee, and a cool and fresh fruit salad for a satisfying and easy breakfast or brunch.