A Burger for Rachael

Name: A Burger for Rachael
Ingredients: 4 large Idaho potatoes, scrubbed; 1/3 to 1/2 cup extra-virgin olive oil, divided; 4 to 5 sprigs fresh rosemary, finely chopped; Salt; Freshly ground black pepper; 2 teaspoons crushed red pepper flakes, divided; 4 to 5 cloves garlic; 1/2 pound ground sirloin; 1/2 pound ground pork; 1 tablespoon grill seasoning; 2 teaspoons fennel seed; 2 teaspoons Worcestershire sauce; 3 tablespoons capers; 2 teaspoons anchovy paste; Handful fresh flat-leaf parsley; 1 teaspoon lemon zest; 3/4 cup pitted black or green olives; 4 slices sharp provolone or thinly sliced smoked mozzarella; 4 crusty rolls, such as sesame Keiser rolls, split; 2 vine ripe tomatoes, thinly sliced; 10 to 12 basil leaves, torn or shredded; 1/2 red onion, thinly sliced