Twist on my favorite comfort food… Yum! I always serve with tomato soup… Of course!
Mash avocados in a large bowl. Add onion, lime juice, jalapeno, cilantro, garlic, salt, and pepper. Mix until well combined. Stir tomato into the guacamole.
Spread desired amount of guacamole over 2 bread slices; top each with 2 slices Havarti cheese. Cover with the remaining 2 slices bread; butter the outsides.
Heat a skillet to medium-high heat. Cook sandwiches until golden brown on the bottom, 2 to 3 minutes. Flip and cook until other side is browned, 2 to 3 minutes more.
Per Serving: 755 calories; protein 20.9g; carbohydrates 47.3g; fat 57.6g; cholesterol 81.8mg; sodium 1354.5mg.