To start, preheat your oven to 450 degrees F
Wash and break the stems off of roughly 36 small mushrooms or 24 large mushrooms
Slice a very slim bottom off of each top if the mushroom heads are round to create a flat surface so they sit level and flat on the baking sheet
Dice up the mushroom stems and saute in a medium skillet with
2 cloves garlic, minced
2 Tablespoons butter
1/4 large onion
Cut into very small pieces
2 Cup fresh spinach leaves
1/2 red bell pepper
To a large mixing bowl combine the spinach, peppers, and sauteed mushrooms stems
To that same bowl add
1/4 teaspoon salt
1/4 teaspoon fresh cracked pepper
3/4 Cup cream cheese
1/4 Cup parmesan cheese
1/4 Cup feta cheese
Stir to combine everything
With a small spoon carefully stuff the mushrooms
Sprinkle with additional shredded parmesan cheese
Bake for 12-14 minutes until melted and lightly browned