Black Bean Burger with Heart of Palm Ceviche

Sunday night we prepared our first Blue Zone dinner, from the Blue Zone Cookbook. Black been burgers with a heart of palm ceviche. The burgersThe Patty and Buns: 11/2 cups rolled oats1 cup peeled, mashed, cooked sweet potato1 cup mashed black beans1/2 teaspoon salt2 teaspoons onion powder1 teaspoon ground cumin1 teaspoon smoked paprika1/2 teaspoon black pepper1/2 teaspoon chipotle powder, optional Oil for cooking4 whole wheat burger buns, we used Dave’s Killer bread whole wheat buns The Sauce:1/4 cup toasted pepitas1/4 cup good-quality salsa verdeThe Toppings: 1 avocado, slicedPickled or thinly sliced raw red onion To make the patties, pulse the rolled oats in a food processor until coarsely ground and set aside. Combine the sweet potato, black beans, salt,...