In a bowl, combine 1 1/4 pounds ground sirloin, 1/4 cup each ketchup and chopped shallot, 2 tablespoons chopped parsley and 1 chopped garlic clove; season with salt. Divide the mixture into 8 mounds. Working with one mound at a time, press 1 tablespoon blue cheese into the center and shape the meat around it; press to form a patty. Preheat a grill to medium-high. In a bowl, combine 3 tablespoons butter and 2 teaspoons each chopped garlic and chopped parsley. Spread the butter on both sides of 8 slices baguette. Thread 1 patty, a dill pickle half and a baguette slice raft-style onto two 12-inch skewers. Repeat with the remaining patties. Grill, flipping once and basting the meat with ketchup, for 8 minutes.
