You are here: Home » Recipes » Mushrooms Fra Diavlo Mushrooms Fra Diavlo Recipe by Relish Contributor Yield 4 servings For Mushrooms fra Diavolo, you can use button mushrooms or a combination of varieties. If you prefer less spice. PrintEmail Ingredients 2 teaspoons pure olive oil1 medium onion, chopped (1 cup)1 medium green bell pepper, chopped (1 cup)1 1/2 pounds mushrooms, thickly sliced (button mushrooms or a combination of button, shiitake, cremini and portobello mushrooms may be used)2 garlic cloves, minced1 medium tomato, chopped (1 cup)1 teaspoon dried red chili flakes1/4 cup basil leaves, minced1 (26-ounce) jar commercially prepared marinara or your favorite meatless tomato sauce Instructions Place oil in a heavy bottom nonreactive saucepan and heat over medium heat. Add the onions and green peppers; saute for 2 to 3 minutes or until slightly softened. Add the sliced mushrooms and garlic, continue to saute for 2 to 3 minutes longer. Add the diced tomatoes and chili flakes, saute for approximately 2 minutes longer. Add the basil and tomato sauce. Mix ingredients, reduce heat and simmer stirring occasionally for 30 minutes until flavors blend and vegetables are tender.