Stuffed Portobello Mushrooms with Tomato and Basil

Preheat the oven to 375 degrees F (190 degrees C).

Remove mushroom stems and reserve caps. Chop stems finely and place in a bowl.

Add 1/2 cup olive oil, basil, garlic, salt, and pepper to mushroom stems and mix well.

Brush mushroom caps with 1 teaspoon olive oil. Place in a large baking dish with undersides of caps facing up. Spread 1 tablespoon basil mixture over caps. Place 1 tomato slice on top of each cap.

Bake in the preheated oven for 20 minutes.

Remove from the oven, leaving oven on. Top mushrooms with mozzarella cheese slices. Return to the oven and bake until cheese is completely melted over mushroom caps, about 5 minutes more.