Making Crab-Stuffed Mushrooms is straightforward. Follow these simple steps to create this delightful dish:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Mushrooms: Clean the mushrooms with a damp paper towel and remove the stems. Set the caps aside and chop the stems finely.
3. Cook Stems: In a skillet, heat a small drizzle of olive oil over medium heat. Add the chopped mushroom stems and minced garlic, cooking until softened (around 3-5 minutes).
4. Mix Filling: In a mixing bowl, combine the lump crab meat, cream cheese, mozzarella cheese, Parmesan cheese, mayonnaise, lemon juice, cooked mushroom stems, chopped parsley, Old Bay seasoning, and salt and pepper. Mix well until combined.
5. Stuff Mushrooms: Generously fill each mushroom cap with the crab mixture, packing it slightly to ensure they are well-filled.
6. Arrange on Baking Sheet: Place the stuffed mushrooms on a greased baking sheet. Drizzle a little olive oil on top of each stuffed mushroom for added flavor and moisture.
7. Bake: Place the baking sheet in the preheated oven and bake for 20 minutes, or until the mushrooms are tender and the tops are golden.
8. Garnish: Remove from the oven and allow to cool for a few minutes. If desired, sprinkle with extra chopped parsley for garnish before serving.

These steps will lead you to your delicious Crab-Stuffed Mushrooms in no time!