Portabella Veggie Burger Mushroom Melts are a delicious and satisfying vegetarian dish that perfectly combines hearty flavors and creamy textures. These mouthwatering melts feature large Portabella mushroom caps filled with savory veggie burgers and topped with a rich spinach-feta cheese mixture. Baked until warm and golden, they serve as an excellent meatless main course or a delightful appetizer for any gathering. Easy to prepare in under an hour, this recipe is perfect for busy weeknights or casual get-togethers, guaranteed to please both vegetarians and non-vegetarians alike.