Preheat oven to 350F.

Cut the entire pack of grandma buns in half horizontally. Spread the pesto onto the bottom half of the buns. Place two slices of Soleterra d’Italia calabrese piccante salami on each bun, then one slice of havarti cheese. Place the other half of the buns back on top and brush the top of each bun with garlic butter.

Bake for 15 minutes or until the cheese is melted. Remove from the oven, pull apart and enjoy.