Greek Stuffed Portobello Mushrooms

Preheat oven to 400 degrees F.

Combine 2 tablespoons oil, garlic, 1/4 teaspoon pepper and salt in a small bowl. Using a silicone brush, coat mushrooms all over with the oil mixture. Place on a large rimmed baking sheet and bake until the mushrooms are mostly soft, 8 to 10 minutes.

Meanwhile, combine spinach, tomatoes, feta, olives, oregano and the remaining 1 tablespoon oil in a medium bowl. Once the mushrooms have softened, remove from the oven and fill with the spinach mixture. Bake until the tomatoes have wilted, about 10 minutes.