This simple cheesy squash casserole features a blend of cheeses and crunchy crackers. It graces the tables as a main dish.
Remove the outer skin from the onion. Scrub the onion and squash with a vegetable brush while holding under cold running water. Slice the onion and squash on your produce cutting board.
Heat oil over medium heat in a large skillet. Add the squash, onion, and butter to the skillet. Cook onions and squash until they are soft, about 5 minutes. Transfer to a bowl and stir in Parmesan cheese, Cheddar cheese, sour cream, salt, and pepper.
Place mixture into a greased casserole dish and sprinkle the cracker crumbs evenly over the top.
Preheat the oven to 350°F. Place the casserole dish on the center rack in the preheated oven and bake until the top is golden and bubbly, about 20 minutes.
Serving Size 3
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.