Preheat the oven to 350F.
Heat olive oil in a pan on medium heat. Cook sliced onion and minced garlic for 2 min.
1 Tbsp extra virgin olive oil, 1 small onion,, 2 cloves garlic,
Add chopped bell pepper and cook for 5 more minutes.
½ red bell pepper,
Add spinach, cook for 1 min, or until spinach has wilted.
2 cups spinach,
Remove from heat and add cream cheese. Stir to combine.
⅓ cup cream cheese
Add ⅓ cup breadcrumbs, salt and pepper and stir again.
⅓ cup bread crumbs, pinch salt, pinch black pepper
Wash the mushrooms, remove the stems and trim the edges. Arrange on a baking sheet.
1 lbs large mushrooms
Stuff with the filling.
Mix 1 tbsp breadcrumbs with ¼ cup of grated parmesan and ½ tsp Italian seasoning in a small bowl. Sprinkle on top of the mushrooms.
1 Tbsp bread crumbs, ¼ cup Parmesan cheese, ½ tsp Italian seasoning
Bake for 20-25 min, mushrooms should be cooked and the tops golden brown.