Cozy Butternut Sausage Casserole (Printable)

Hearty casserole with butternut squash, Italian sausage, quinoa, and melted cheeses, perfect for chilly evenings.

# What You'll Need:

→ Vegetables

01 - 1 medium butternut squash, peeled, seeded, and cut into 1-inch cubes
02 - 1 medium onion, diced
03 - 2 cloves garlic, minced
04 - 3 cups baby spinach
05 - Fresh parsley for garnish, optional

→ Meats & Protein

06 - 1 pound Italian sausage, sweet or spicy, casing removed
07 - 1 cup cooked quinoa

→ Dairy

08 - 1 cup shredded mozzarella cheese
09 - 0.5 cup grated Parmesan cheese

→ Pantry & Spices

10 - 2 tablespoons olive oil
11 - 1 teaspoon dried thyme
12 - 1 teaspoon dried sage
13 - 1 teaspoon paprika
14 - Salt and pepper to taste

→ Liquids

15 - 1 cup chicken or vegetable broth

# Directions:

01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or olive oil.
02 - In a large skillet, heat olive oil over medium heat. Add diced onion and cook until translucent, approximately 5 minutes.
03 - Add minced garlic and cook for 1 minute until fragrant.
04 - Increase heat slightly, add Italian sausage, and cook until browned and cooked through, breaking apart with a wooden spoon, approximately 7 to 10 minutes.
05 - Add butternut squash cubes to the skillet. Stir in dried thyme, dried sage, paprika, salt, and pepper. Cook for 5 to 7 minutes, stirring occasionally, until squash begins to soften.
06 - Add baby spinach and cooked quinoa, stirring until spinach wilts completely.
07 - Pour in chicken or vegetable broth and simmer for 3 to 4 minutes.
08 - Transfer the sausage and squash mixture to the prepared baking dish. Spread evenly and top with shredded mozzarella and grated Parmesan cheese.
09 - Cover with aluminum foil and bake in preheated oven for 25 minutes.
10 - Remove foil and bake for an additional 15 to 20 minutes until cheese is bubbly and golden brown.
11 - Remove from oven and let cool for 5 minutes. Garnish with fresh parsley before serving.

# Expert Tips:

01 -
  • It's a one-pan wonder: Most of the work happens in your skillet, then it slides into the oven while you actually sit down.
  • The squash gets silky and sweet: Roasting brings out flavors that seem to play beautifully with sage and the saltiness of sausage.
  • Protein from multiple sources means you stay full: Sausage, quinoa, and cheese team up so you're genuinely satisfied hours later.
02 -
  • The foil truly matters: I learned this the hard way by skipping it once and ending up with dried-out squash on top and undercooked squash underneath—covering those first 25 minutes is non-negotiable.
  • Cut your squash pieces uniformly: Uneven chunks mean some get mushy while others stay crunchy, and uniform size is what makes every bite satisfying.
  • Don't skip browning the sausage properly: Rushing through this step means you miss out on the caramelization that makes this casserole actually taste like comfort.
03 -
  • Buy pre-cut butternut squash if your knife skills need support: The time you save is worth the small extra cost, and you'll actually make this more often.
  • Toast your spices gently in the warm oil before adding the squash: Just a quick 30 seconds releases their oils and makes them taste more vibrant and alive.
  • Use half-and-half or heavy cream instead of some of the broth if you want it richer: This turns it into something almost gratinéed and makes it feel restaurant-worthy.
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