Name: Kielbasa and Vegetable Casserole
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Ingredients: 14 ounce package kielbasa smoked sausage (, sliced into 1/2-inch thick coins); 1 pound baby yellow (or red) potatoes (, halved or quartered (each piece should be no bigger than 1-inch in size after being cut)); 6 ounces fresh green beans (, ends trimmed, cut in half if very long); 6 ounces cremini mushrooms (, cleaned, halved (or quartered if they are very large)); 1 small sweet onion (, peeled, cut into 1-inch pieces); 2 cloves garlic (, minced); 3 teaspoons dried Italian seasoning; 1/4 teaspoon onion powder; 1/8 teaspoon crushed red pepper flakes; 2 tablespoons chopped fresh parsley; coarse salt and freshly ground black pepper (, to taste); 5 tablespoons olive oil

This Kielbasa and Veggie Casserole is a super delicious, high protein, all-in-one easy weeknight meal with simple prep and just one dish to clean up! It’s also dairy free and gluten free, so it accommodates many different diets without skimping on flavor.

overhead baked sliced kielbasa, mushrooms, onion, and green beans in casserole dish

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I just love kielbasa and always have it on hand to add to scrambled eggs, in a kielbasa and cabbage skillet, rice and beans, lentil soup, and casseroles like this one. Paired with a few vegetables and seasonings, you just can’t go wrong for an effortless meal.

This kielbasa and veggie casserole is inspired by my kielbasa vegetable foil packets, using the same ingredients including smoked sausage, four different vegetables, and seasonings, but instead of individual foil packs for camping, everything is just dumped into a casserole dish and baked! There’s super easy prep in just 10 minutes or so, with no pre-cooking anything. It’s healthy, satisfying and filling, and so delicious with minimal cleanup.

overhead baked sliced kielbasa and vegetables in casserole dish and serving spoon

What’s in this Kielbasa and Veggie Casserole recipe?

Kielbasa, four different veggies, and pantry seasonings are needed to make this casserole recipe. Scroll down to the recipe card below for the exact measurements.

Kielbasa Smoked Sausage – Kielbasa to the rescue again. Unlike fresh sausages, it’s already smoked/cooked and it’s so flavorful. If you like things spicy, Andouille sausage can be used instead.
Potatoes – While any potatoes do work, we prefer baby yellow (or red) potatoes because of their creaminess and thin, delicate skin which you can leave on for added flavor. No need to peel, saving you one less step to prep.
Green Beans – Fresh green beans add a nice earthy flavor and are so nutritious. If you don’t like green beans, diced up red bell pepper would be a good replacement.
Mushrooms – Cremini mushrooms are soft and tender, and lend a savory flavor to the dinner. You could also use button mushrooms. If you don’t like mushrooms at all, simply leave them out.
Onion – Cut up onions become tender and slightly sweet as they absorb the moisture and flavors from the other ingredients.
Garlic – Fresh minced garlic provides wonderful aromatics and flavor.
Seasonings – Dried Italian seasoning, onion powder, crushed red pepper flakes, salt, pepper, and fresh chopped parsley brings it all together.
Olive oil – Adds richness and necessary moisture.

The size of the potatoes matter

The potatoes take the longest to cook, so it’s important to cut them small. If you prepare them properly, you should not need to pre-cook them. Baby potatoes are already fairly small, but they do vary in size. The potato pieces should be no bigger than 1-inch in size once cut.

overhead baked sliced kielbasa, mushrooms, onion, and green beans on plate

Meal Prep and Storing Leftovers

Meal prep. You can cut up the vegetables and slice the kielbasa a day before making the dish. Keep them in airtight containers in the refrigerator.
Fridge. Let anything leftover cool completely and transfer to an airtight container. Store in the refrigerator for up to 2 days.
Freezer. Freezing this dish is not my preference, since the vegetables tend to get mushy once thawed. However, you can freeze it if necessary. Allow the leftovers to cool to room temperature before sealing them in an airtight freezer-safe container and storing them in the freezer. They will keep for up to 2 months.
Reheat. Make sure it’s thawed, if frozen. Warm portions in the microwave in 30-second intervals until warmed through. If you’ve got an air fryer, that works too! Arrange in a single layer in the air fryer basket and air fry for 3-4 minutes at 375°F, shaking halfway through.

I hope you love this delicious and easy recipe – be sure to give it a review below! Also don’t forget to follow Belly Full on TikTok, Instagram, Facebook, Pinterest, and YouTube!

Kielbasa and Vegetable Casserole

This Kielbasa and Veggie Casserole is a flavor-packed, high protein, all-in-one easy weeknight meal with simple prep and just one dish to clean up!

Print Recipe Rate Recipe Pin Recipe

Prep Time 10

Cook Time 35

Total Time 45

Servings: 6

Ingredients

14 ounce package kielbasa smoked sausage , sliced into 1/2-inch thick coins
1 pound baby yellow (or red) potatoes , halved or quartered (each piece should be no bigger than 1-inch in size after being cut)
6 ounces fresh green beans , ends trimmed, cut in half if very long
6 ounces cremini mushrooms , cleaned, halved (or quartered if they are very large)
1 small sweet onion , peeled, cut into 1-inch pieces
2 cloves garlic , minced
3 teaspoons dried Italian seasoning
1/4 teaspoon onion powder
1/8 teaspoon crushed red pepper flakes
2 tablespoons chopped fresh parsley
coarse salt and freshly ground black pepper , to taste
5 tablespoons olive oil

Instructions

Preheat the oven to 425 degrees F. Coat a 10×15 baking dish with nonstick cooking spray.
Dump all the ingredients in the baking dish and toss to coat.
Cover very tightly with foil, transfer to the oven and bake for 35-40 minutes or until potatoes are fork tender.
Serve and enjoy!

Video

Notes

The size of the potatoes matter! They take the longest to cook, so it’s important to cut them small. If you prepare them properly, you should not need to pre-cook them. Baby potatoes are already small, but they do vary in size. Once cut, they should be no bigger than 1-inch in size.

Nutrition

Nutritional information given is an automatic calculation and can vary based on the exact products you use and any changes you make to the recipe. If these numbers are very important to you, I would recommend calculating them yourself.

Other Notes

Course: Main Course

Cuisine: American

Keyword: easy dinner casseroles, kielbasa and vegetables