1 Heat oven to broil, with top rack about 4” from broiler.2 Brush both sides of mushrooms with oil. Place mushrooms, gill side down, in a 9 inch baking dish3 Broil for 4 minutes, remove and turn gill side up, broil 4 minutes.4 Remove mushrooms from baking dish, drain excess liquid. Reduce oven to 400 degrees.5 Spread 1/2 cup pasta sauce on bottom of baking dish, then place mushrooms, gill side up. Sprinkle with basil, red pepper flakes and the remainder of the pasta sauce. 6 Top with mozzarella cheese and parmesan; bake 5-10 minutes, until the cheese begins to brown. Remove and serve.