Begin by gathering all your ingredients on a clean surface: ripe avocados, Havarti cheese, whole grain bread, and mayo for the spicy kick.

Slice the ripe avocado in half, carefully remove the pit, and scoop the green goodness into a bowl.

Using a fork, mash the avocado to your desired consistency, seasoning with a pinch of salt and optionally lime juice.

In a separate bowl, combine your mayonnaise with hot sauce, mixing well until smooth.

Spread the spicy mayo generously on one side of each slice of whole grain bread.

Layer on the creamy, mashed avocado, followed by slices of Havarti cheese and add crisp lettuce if desired.

Top with the other slice of bread, mayo-side down, to complete the sandwich.

For a warm, melty experience, heat a skillet over medium heat and grill the sandwich for 3-4 minutes on each side.

Once golden and crispy, let it cool for a minute, slice in half, and serve with a side of salad or chips.