The unofficial start of summer is here, try these delicious stuffed burgers at your next backyard party! Yields: 4 Ingredients 4 oz. cream cheese, softened 1 c. shredded mozzarella 1/4 c. freshly grated Parmesan 1/2 c. frozen spinach, defrosted 1/2 c. chopped artichoke hearts 1 clove garlic, minced pinch of crushed red pepper flakes (optional) kosher salt Freshly ground black pepper 1 1/2 lb. ground beef 4 Hamburger buns Vegetable oil, for brushing   Directions In a medium bowl, combine cream cheese, mozzarella, Parmesan, spinach, artichoke hearts, garlic and red pepper flakes (if using). Season with salt and pepper and[...]