Pepperoni Pizza Keto Crustless Quiche

Name: Pepperoni Pizza Keto Crustless Quiche
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: European, American, Mediterranean, French
Ingredients: 8 oz. sliced mushrooms; 2 tsp. olive oil (for browning mushrooms); 1 2.25 oz. can sliced black olives, drained well (Olives are optional but they're good if you like olives on pizza.); 1 cup shredded Mozzarella cheese; 1 cup shredded Italian Blend cheese (sometimes called Pizza cheese); 1 tsp. + 1/2 tsp. Italian Herb Seasoning; 4 eggs, beaten well; 1/2 cup heavy cream (see notes); 1/4 tsp. garlic powder; 2 oz. sliced pepperoni