Sweet Potato Black Bean Burgers with Chipotle Mayo

Name: Sweet Potato Black Bean Burgers with Chipotle Mayo
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: American, Latin American
Ingredients: Mayonnaise, 6 tbsp; 2 tbsp adobo sauce from canned chipotles in adobo; 3 tbsp olive oil; 1 yellow onion, finely chopped (2 cups); 2 cups sweet potato, shredded (1 lg potato); 2 garlic cloves, minced; 1/4 cup tomato paste; 1/3 cup raw pepitas; 2 canned chipotle peppers in adobo; 1 tbsp adobo sauce, from canned chipotle peppers in adobo; 2 tsp ground cumin; 1.25 tsp fine sea salt; .5 tsp smoked sweet paprika; 1 can (14 oz) black beans, drained and rinsed; 1.5 cups cooked short-grain brown rice; .75 cup dry breadcrumbs; 6 burger buns, toasted; Guacamole, or sliced avocado; Lettuce; Sliced tomatoes; Quick Picked Red Onions, page 289