Vegan BBQ Tempeh Sandwiches

Name: Vegan BBQ Tempeh Sandwiches
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 8 ounces tempeh, roughly chopped; 4 hamburger buns; 1 recipe BBQ sauce, below (or purchased BBQ sauce); 1 recipe poppyseed rainbow coleslaw, below; 2 cups finely shredded purple cabbage; 2 cups finely shredded green cabbage; 1 cup finely shredded carrots (I just use a box grater); 1/4 cup finely chopped parsley; 1 tablespoon sesame seeds; 1 tablespoon poppy seeds; 2 tablespoons dairy-free mayo; 2 tablespoons olive oil; 2 tablespoons lemon juice; 1 garlic clove, minced; pinch cumin; 1/2 teaspoon salt; 1 cup ketchup; 1/4 cup apple cider vinegar; 1 tablespoon brown sugar; 2 tablespoons maple syrup; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon onion powder; 1/4 teaspoon ground mustard; 2 teaspoons lemon juice; 2 teaspoons soy sauce; 1 tablespoon olive oil; 1 teaspoon chipotle powder (or chili powder); 1/2 teaspoon smoked paprika; 1 teaspoon ground cumin