Follow these simple steps to create your delicious Spinach Stuffed Mushrooms:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Mushrooms: Clean the mushrooms with a damp paper towel. Remove the stems and set aside.
3. Make the Filling: In a medium pan, heat olive oil over medium heat. Add minced garlic and sauté for about 1 minute.
4. Add Spinach: Stir in the chopped spinach and cook until wilted, about 2-3 minutes. Remove from heat.
5. Mix Ingredients: In a large bowl, combine the sautéed spinach, cream cheese, Parmesan cheese, mozzarella cheese, oregano, salt, pepper, and optional red pepper flakes. Mix until well combined.
6. Stuff the Mushrooms: Spoon the filling generously into each mushroom cap, pressing lightly to pack it in.
7. Bake the Mushrooms: Place the stuffed mushrooms on a baking tray lined with parchment paper. Bake for 20 minutes or until the mushrooms are tender and the tops are golden brown.
8. Cool and Serve: Allow the mushrooms to cool slightly before serving.

These steps will guide you toward creating amazing Spinach Stuffed Mushrooms everyone will love!