Rich and filling, this pizza-meets-garlic-bread casserole is perfect for a Friday night when your kid invites over half the neighborhood. The cheese, pepperoni, and mushrooms are a match made in heaven for buttery bread, and the bottom of the casserole gets nice and crisp. Pepperoni slices have a tendency to stick together, so make sure to separate them nicely when you stick them into the pan with the marinara. 

Robin Bashinsky

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Read the full recipe after the video.

Recipe Summary

active:
25 mins
total:
35 mins
Yield:
Serves 8 (serving size: 2 cups)
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Ingredients

Ingredient Checklist

Directions

Instructions Checklist
  • Preheat oven to 425°F with rack in bottom position. Heat oil in a large skillet over high. Add mushrooms and onion; cook, stirring often, until mushrooms are browned and softened, 7 to 8 minutes. Stir in marinara sauce and 4 ounces of the pepperoni (about 56 slices). Remove from heat.

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  • Coat a deep 13- x 9-inch casserole dish with cooking spray. Arrange garlic bread, lying flat with cut sides up, in casserole dish. Top evenly with mushroom-pepperoni mixture. Sprinkle with mozzarella. Arrange remaining 2 ounces pepperoni (about 28 slices) over mozzarella. Sprinkle with Parmesan. Bake in preheated oven until cheese is bubbly and lightly browned, 12 to 15 minutes. Let stand 5 minutes. If desired, sprinkle with crushed red pepper.