Gather all your ingredients and halve the ripe avocado, remove the pit, and scoop the creamy flesh into a mixing bowl.

Mash the avocado in the bowl to your desired consistency. Mix in a pinch of salt and lime juice if preferred.

In a small bowl, blend together mayonnaise and hot sauce until well mixed.

On a slice of whole grain bread, spread a generous layer of the spicy mayo. Layer on slices of Havarti cheese followed by the mashed avocado.

If using, add a few crisp leaves of lettuce. Optionally, grill the assembled sandwich in a skillet over medium heat for about 3-4 minutes on each side.

Serve immediately, perhaps alongside fresh fruit or a light salad.