Instructions

1. For the garlic mayo: To a bowl, add the mayonnaise, fresh rosemary leaves, and clove of minced or microplaned garlic. Add ½ teaspoon salt, to taste. Cover and set aside to let the flavors marry.
2. For the burgers: In a medium-large bowl, mix the fresh herbs into the ground pork. Form the beef into 4 even ball-shaped portions, about 4 ounces each. Sprinkle them evenly on all sides with the salt.
3. Heat a grill pan or large skillet over medium-high until hot, about 2 minutes. Add the olive oil to the pan. Working in batches if necessary to not over-crowd the pan, place the portions on the griddle. With a spatula, immediately smash the burgers down flat. Cook undisturbed for about 3-4 minutes, or until the outer edges of the patties look a deep golden brown. Flip the patties, and top each with a slice of taleggio cheese (or your cheese of choice). Continue to cook for 3 minutes longer, until the cheese is beginning to melt and the other side of the patties are golden brown.
4. Transfer the burgers to a plate to allow them to rest, and lower the heat on the stove to medium. Take the burger buns, and place them in the pan cut-side down. Grill for about 30 seconds or until golden and crispy around the bottom edges, being careful not to burn the bread.
5. To assemble the burgers: Spread a dollop of the mayonnaise mixture on the tops and bottoms of the toasted buns. To the bottom buns, add a handful of arugula. Place the patties on top. Serve with ketchup if desired.