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The Best Steak Bite Tortellini with Fontina & Roasted Mushroom Blend Casserole


  • Author: michelle cooking
  • Total Time: 1 hour
  • Yield: 6 servings 1x

Description

This hearty casserole combines tender steak bites, cheesy tortellini, roasted mushrooms, and a rich Fontina cream sauce. It’s the perfect comfort dish for family dinners, gatherings, or any evening when you want a meal that feels both indulgent and satisfying.


Ingredients

Scale
  • h or refrigerated)

  • 3 cups mixed mushrooms (cremini, shiitake, portobello), sliced

  • 3 tbsp butter

  • 3 tbsp all-purpose flour

  • 3 cups whole milk (or half-and-half for richer sauce)

  • 2 cups shredded Fontina cheese

  • 1 cup shredded mozzarella (optional, for topping)

  • 1 tsp garlic powder

  • ½ tsp thyme

  • ½ tsp black pepper

  • Salt, to taste

  • Fresh parsley, for garnish


Instructions

  • Preheat oven to 400°F (200°C). Toss the mushrooms with 1 tbsp olive oil, salt, pepper, and thyme. Spread on a baking sheet and roast for 15–20 minutes until golden.

  • Heat the remaining olive oil in a skillet over medium-high heat. Add steak cubes and sear quickly until browned on all sides. Remove and set aside.

  • Cook the tortellini in salted boiling water until just al dente, about 1 minute less than package directions. Drain and set aside.

  • In a saucepan, melt the butter over medium heat. Whisk in flour to form a roux and cook for 1–2 minutes. Slowly add the milk, whisking until smooth and thickened. Stir in Fontina cheese, garlic powder, and black pepper.

  • In a greased 9×13-inch baking dish, combine tortellini, roasted mushrooms, and steak. Pour the Fontina sauce over and toss gently to coat. Top with mozzarella if desired.

  • Bake uncovered at 375°F (190°C) for 20–25 minutes, until golden and bubbly.

  • Garnish with fresh parsley and serve warm.

Notes

  • To add extra flavor, mix in caramelized onions or sun-dried tomatoes.

  • For a crunchy topping, sprinkle buttered breadcrumbs before baking.

  • This dish can be assembled a day ahead and baked before serving.

  • Substitute chicken, sausage, or more mushrooms for variations on the protein.

  • Prep Time: 20 minutes
  • Cook Time: 40 minutes