Beef-Stuffed Mushrooms (Savory Baked Appetizer) - My Home Made Recipe

Ingredients

• 20 medium cremini mushrooms, about 1 1/2 to 2 inches wide
• 1 tablespoon olive oil, plus more for the baking sheet
• 1/4 teaspoon kosher salt
• 8 oz (225 g) lean ground beef
• 1/4 cup finely diced yellow onion
• 3/4 cup finely chopped mushroom stems
• 2 cloves garlic, minced
• 1/2 teaspoon Italian seasoning
• 1/2 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 2 oz (55 g) cream cheese, softened
• 1/3 cup (25 g) panko breadcrumbs
• 1/4 cup (25 g) grated Parmesan cheese
• 2 tablespoons chopped fresh parsley, plus more for serving
• 1/2 cup (55 g) shredded mozzarella cheese