BBQ Rig Pineapple Express Sandwich

Name: BBQ Rig Pineapple Express Sandwich
Ingredients: 2 tablespoons coriander seeds, cracked; 2 tablespoons black peppercorns, cracked; 2 1/2 pounds beef brisket (flat); 3/4 cup kosher salt; 3/4 cup brown sugar; 1/2 cup honey; 4 teaspoons pink salt; 2 tablespoons pickling spice; 3 cloves fresh garlic, minced; 1/2 golden pineapple; 1/2 cup mayonnaise; 1 tablespoon sriracha; 12 ounces mayonnaise; 2 tablespoons seasoned rice vinegar; 1 tablespoon lime juice; 1 tablespoon sambal oelek; 1 tablespoon granulated sugar; 1 tablespoon white vinegar; 1/8 tablespoon granulated garlic; 1 1/2 pounds shredded green cabbage; 12 ounces shredded red cabbage; 6 ounces grated carrot; BBQ Rig Sweet Buns, recipe follows; 3 ounces sourdough starter; 1 1/8 tablespoons granulated sugar; 1/8 teaspoon ground turmeric; 1 3/4 ounces bread flour; 5.3 ounces bread flour; 1/3 tablespoon dry yeast; 1/4 tablespoon kosher salt