My hubby loves this dish. Can eat almost an entire tray himself in a single sitting!

Olive oil 2 tablespoons
Butter 1 tablespoon
Onion, chopped 1
Sliced mushrooms 1 package (8 oz)
Beef broth 2 cups
Heavy cream 1 cup
Cornstarch 1 tablespoon
Water 1 tablespoon
How To Make Baked Beef Meatballs in Creamy Mushroom Sauce
Step 1: Prep & Bake Meatballs: Preheat your oven to 400°F (200°C). In a large bowl, combine the ground beef, breadcrumbs, Parmesan cheese, egg, garlic, parsley, salt, and pepper. Mix until well blended. Shape the mixture into 1-inch meatballs and place them on a baking sheet lined with parchment paper. Bake for 20-25 minutes, or until they are cooked through.

Step 2: Make the Sauce: Meanwhile, heat the olive oil and butter in a large skillet over medium heat. Add the chopped onion and sliced mushrooms and sauté until the onions are translucent and the mushrooms are tender.
Step 3: Simmer & Thicken: Stir in the beef broth and bring the mixture to a simmer. Reduce the heat to low and mix in the heavy cream. Cook for an additional 5 minutes, stirring occasionally. Thicken the sauce by adding the cornstarch mixture while stirring. Allow it to simmer until it reaches your desired consistency.
Step 4: Combine & Serve: Once the meatballs are cooked, add them to the skillet with the sauce and gently stir to coat them evenly. Serve the meatballs hot, drizzled with the creamy mushroom sauce