Quick Onion Casserole
A savory onion casserole combining sweet onions, sausage, crispy crackers, and melted cheese, baked to golden perfection—perfect for cozy family dinners or gatherings.
Ingredients
Instructions
- Preheat oven to 400°F.
- Spray a 9 x 13-inch baking dish with nonstick vegetable spray.
- Place half of the sliced onions on the bottom of the dish.
- Layer with crushed Ritz-type crackers.
- Add crumbled brown and serve sausage.
- Top with remaining sliced onions.
- Spread cream of mushroom soup over the onions.
- Sprinkle seasoned salt over the soup.
- Finish with grated Cheddar cheese.
- Bake for 1 hour until golden and bubbly.
- Serve hot.
Tips & Substitutions
For a richer flavor, consider sautéing the onions in a bit of butter before layering them in the casserole. If you want a vegetarian version, substitute the sausage with a plant-based alternative or add more vegetables like bell peppers or mushrooms. You can also use cream of celery soup instead of cream of mushroom for a different taste.
Serving Suggestions
This Quick Onion Casserole is delicious on its own but can be served alongside a fresh green salad or steamed vegetables for a complete meal. It pairs beautifully with Lo-Cal Potato Salad for a hearty lunch or dinner. Consider adding a dollop of sour cream or a sprinkle of fresh herbs before serving for added flavor.
Storage & Reheating
Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat, cover with foil and warm in a 350°F oven until heated through, about 20-25 minutes. Alternatively, you can microwave individual portions on medium power for 2-3 minutes.
Nutrition & Diet Analysis (per serving)
Each serving of Quick Onion Casserole contains roughly 1634 calories, with 46g protein, 149g carbohydrates, and 95g fat. It is an excellent source of protein (92% of the Daily Value), calcium (79% of the Daily Value), and iron (66% of the Daily Value). Note that it is relatively high in sodium, at 3000mg per serving (130% of the Daily Value).
Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.
* % Daily Values based on a 2,000 calorie diet (FDA 2020).
Frequently Asked Questions
Can I use a different type of onion?
Yes, you can use yellow or even red onions if you prefer a different flavor profile. However, sweet onions provide a milder taste that complements the other ingredients well.
Can I prepare this casserole ahead of time?
Absolutely! You can assemble the casserole a day in advance, cover it tightly, and store it in the refrigerator. Just increase the baking time slightly if baking straight from the fridge.
Is there a gluten-free option for this recipe?
Yes, you can substitute the Ritz-type crackers with gluten-free crackers or breadcrumbs. Just ensure that the sausage and soup you use are also gluten-free to keep the entire dish safe for gluten-sensitive diets.
Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).