Venison Meatballs with Creamy Mustard Sauce

Name: Venison Meatballs with Creamy Mustard Sauce
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: aluminum foil; 1 pound ground venison; 4 ounces mild Italian sausage; 0.5 cup grated Parmesan cheese; 0.5 cup Italian seasoned bread crumbs; 1 egg; 2 tablespoons dry white wine; 1 teaspoon minced garlic; 0.5 teaspoon dried basil; 0.5 teaspoon dried oregano; 2 tablespoons olive oil; 1 tablespoon butter; 1 (8 ounce) package sliced baby portobello mushrooms; 2 sprigs fresh thyme, leaves removed; 2 cups half-and-half; 3 tablespoons stone-ground mustard; 1 tablespoon cornstarch; salt and ground black pepper to taste