This Havarti Avocado Sandwich with Spicy Mayo is a vibrant and flavorful open-faced sandwich featuring melting Havarti cheese, fresh avocado slices, tangy pickles, sun-dried tomatoes, and a smoky, spicy mayo. Broiled to bubbly perfection with charred tomatoes on toasted rye or sourdough bread, this sandwich combines creamy, spicy, and fresh elements for a quick, satisfying lunch or light dinner.