There’s something irresistible about a hearty one-dish dinner that delivers big homemade flavor with almost no fuss. This 5-Ingredient Oven Labor Day Feast combines tender baby red potatoes, smoky sausage, sweet yellow onion, olive oil, and savory onion soup mix in one casserole dish for an easy meal the whole family will love.
Everything bakes together until the potatoes are fork-tender, the sausage is beautifully browned, and the onions become soft and flavorful. The result is a comforting, satisfying oven-baked sausage and potato dinner that is perfect for Labor Day, busy weeknights, family gatherings, or any time you want a delicious meal without a pile of dishes.
Best of all, you can have everything assembled in minutes. Just toss, cover, bake, uncover, and brown. It’s the kind of simple recipe that earns a permanent place in your dinner rotation.
🥔 Why You’ll Love This 5-Ingredient Dinner
Only 5 ingredients are needed.
Everything cooks together in one casserole dish.
Minimal preparation makes it ideal for busy weeknights and holidays.
Baby red potatoes become tender and flavorful as they bake.
Smoked sausage adds a rich, savory flavor without requiring complicated seasoning.
Onion soup mix provides plenty of seasoning in one convenient packet.
It’s easy to customize with vegetables your family enjoys.
The recipe is hearty enough to serve as a complete family dinner.
🛒 Ingredients
2 pounds baby red potatoes, halved
Baby red potatoes are perfect for this recipe because their thin skins become deliciously tender while roasting. Halving them helps them cook evenly and gives the finished dish plenty of golden, browned surfaces.
14 ounces smoked sausage, sliced into 1-inch pieces
Smoked sausage provides the main savory component of the dish. As it cooks, its smoky, meaty flavor mingles with the potatoes and onions, creating the rich flavor that makes this casserole so satisfying.
1 medium yellow onion, cut into thick wedges
Yellow onion adds natural sweetness and depth. Cutting it into thick wedges helps it hold its shape while becoming soft and caramelized around the edges.
3 tablespoons olive oil
Olive oil coats the potatoes and vegetables, helping them roast properly while encouraging those delicious browned edges.
1 packet dry onion soup mix
This is the secret to getting maximum flavor from minimal ingredients. The soup mix seasons the entire casserole with a savory blend of onion and spices, eliminating the need for a long list of seasonings.
🍽️ How to Make the 5-Ingredient Oven Labor Day Feast
Step 1: Prepare the oven and casserole dish
Preheat your oven to 400°F. Lightly grease a 9×13-inch glass casserole dish.
Step 2: Add the main ingredients
Place the halved baby red potatoes, sliced smoked sausage, and thick onion wedges directly into the prepared casserole dish.
There’s no need to dirty a separate mixing bowl—the entire dish can be assembled right in the casserole.
Step 3: Add the oil and seasoning
Drizzle the olive oil evenly over the potatoes, sausage, and onions. Sprinkle the dry onion soup mix over everything.
Toss carefully until the ingredients are evenly coated. Try to distribute the seasoning throughout the dish so every bite gets plenty of flavor.
Step 4: Cover and bake
Cover the casserole dish tightly with aluminum foil.
Bake for 35 minutes. Covering the dish initially helps create a moist cooking environment so the potatoes can become tender.
Step 5: Uncover and brown
Carefully remove the foil and give everything a gentle stir.
Return the uncovered casserole to the oven and bake for another 20–25 minutes, or until the potatoes are fork-tender and the sausage and vegetables have developed beautifully browned edges.
Step 6: Rest and serve
Remove the casserole from the oven and let it rest for about 5 minutes.
This brief resting period allows the juices and flavors to settle before serving.
⭐ Pro Tips for the Best Sausage and Potato Casserole
Cut the potatoes evenly. Try to make the potato pieces similar in size so they finish cooking at approximately the same time. Quarter particularly large baby potatoes rather than leaving them much bigger than the rest.
Don’t overcrowd the dish. Arrange the ingredients in a reasonably even layer. This gives the potatoes more exposure to the heat and helps them brown rather than simply steam.
Don’t automatically add salt. Onion soup mix is already seasoned, so taste the finished dish before adding additional salt.
Want extra-crispy edges? Keep the casserole uncovered for the final few minutes. You can also briefly use the broiler for additional browning, but watch it closely because the sausage and potatoes can brown quickly.
Use your favorite smoked sausage. Kielbasa, smoked turkey sausage, or another fully cooked smoked sausage can work beautifully.
Give it a vegetable boost. Add chunks of bell pepper for sweetness, color, and extra texture.
Don’t skip the resting time. Five minutes is all you need, but it gives the casserole a chance to settle before serving.
🌽 What to Serve With Sausage and Potatoes
This oven-baked Labor Day dinner is hearty on its own, but a few simple sides can turn it into a complete holiday-style feast.
Sweet Corn on the Cob
Fresh corn adds a naturally sweet contrast to the smoky sausage and savory potatoes.
Fresh Sliced Tomatoes
Juicy tomatoes provide a bright, refreshing element alongside the rich casserole.
Green Bean Salad
A crisp green bean salad adds freshness and color to the plate.
Warm Dinner Rolls
Soft rolls are perfect for soaking up the flavorful juices left in the bottom of the casserole.
Peach Cobbler
For dessert, a warm peach cobbler keeps the meal feeling wonderfully homemade and seasonal.
Apple Crisp
A simple apple crisp is another excellent choice when you want an easy, comforting dessert.
🔄 Easy Variations
Sausage, Potato & Bell Pepper
Add one large bell pepper, cut into chunks, along with the onions. The peppers become tender and slightly sweet as they roast.
Kielbasa Potato Bake
Replace the smoked sausage with kielbasa for an especially hearty, classic combination.
Turkey Sausage Casserole
Turkey smoked sausage is an easy substitution if you prefer a somewhat lighter option.
Loaded Vegetable Version
Add your favorite roasting vegetables, such as bell peppers or other sturdy vegetables, while keeping the potatoes and sausage as the foundation.
❓ Frequently Asked Questions
Can I use larger potatoes?
Yes. Cut larger potatoes into smaller, evenly sized pieces so they cook at the same rate as the baby potatoes.
Can I use a different sausage?
Absolutely. Kielbasa and fully cooked smoked sausage are excellent choices.
Do I need to peel the potatoes?
No. Baby red potatoes have thin, tender skins, so peeling isn’t necessary.
Can I prepare this casserole ahead of time?
You can prepare and assemble the ingredients ahead of baking, then refrigerate them until you’re ready to cook. For food safety, keep the assembled ingredients properly refrigerated and don’t leave them sitting at room temperature.
How do I know when the potatoes are done?
Insert a fork or knife into the thickest potato piece. It should slide in easily when the potatoes are fully tender.
🏆 The Easiest Labor Day Dinner You’ll Make
This 5-Ingredient Oven Labor Day Feast proves that an impressive family dinner doesn’t require complicated ingredients or hours in the kitchen. With just baby red potatoes, smoked sausage, onion, olive oil, and onion soup mix, you can create a deeply savory, satisfying casserole with tender potatoes, flavorful onions, and beautifully browned sausage.
It’s simple enough for a weeknight, hearty enough for a family gathering, and delicious enough to become a holiday tradition. Toss everything into one dish, let the oven do the work, and enjoy more time around the table with the people you love.
Save this easy sausage and potato casserole for Labor Day, busy evenings, potlucks, and cozy family dinners—you’ll want this five-ingredient recipe within easy reach.