Easy Creamy Bell Pepper Marinara

Ingredients

• 1/4 cup butter
• 1 small onion, sliced
• 1/2 large red bell pepper, cut into matchstick-sized pieces
• 1 clove garlic, minced
• 1/4 cup all-purpose flour
• 1 cup milk
• 1/2 cup grated Parmesan cheese
• 32 ounces tomato sauce (such as Classico Tomato and Basil Sauce)
• 1/4 teaspoon ground black pepper
• 1/2 teaspoon balsamic vinegar
• 1 dash hot sauce, or to taste
• 1 1/2 cups chopped fresh spinach

Directions

Heat butter in a large skillet over medium heat; cook and stir onion, red bell pepper, and garlic until tender, 5 to 10 minutes. Stir in flour until dissolved and thickened, about 5 minutes. Pour in milk, stirring constantly, until well mixed. Add Parmesan cheese; stir until cheese is melted, 5 minutes.

Stir tomato sauce into creamy onion mixture; season with black pepper, balsamic vinegar, and hot sauce. Cook and stir until heated through, 5 to 10 minutes. Sprinkle spinach over sauce to serve.