
Heat the oven to 400°F. Remove the stems and scrape the gills from the mushrooms, brush with oil, season with salt and roast gill-side up 8 minutes.
Thaw the spinach in the microwave and squeeze completely dry.
Mix the spinach with ricotta, parmesan, minced garlic, half the mozzarella, 1/2 tsp salt and pepper.
Pour off any liquid from the caps, spoon a little marinara into each, pile in the filling and top with the rest of the mozzarella.
Bake 12-15 minutes until bubbly, and serve with mixed greens.
Photo: DinnerDrop