Easy Creamy Bell Pepper Marinara

By MaryESP

4.5 / 5

15min

20min

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¼ cup butter
1 small onion sliced
½ large red bell pepper cut into matchstick-sized pieces
1 clove garlic minced
¼ cup all-purpose flour
1 cup milk
½ cup grated Parmesan cheese
32 ounces tomato sauce (such as Classico® Tomato and Basil Sauce)
¼ teaspoon ground black pepper
½ teaspoon balsamic vinegar
1 dash hot sauce or to taste
1 ½ cups chopped fresh spinach