Cook and mash 2 sweet potatoes
Mix mashed sweet potatoes, 2 eggs, salt, and pepper together
Add approximately 2 tbsp of the mixture to a waffle iron until crisped into buns
Combine 1 lb extra lean ground beef with 2 tbsp burger seasoning
Form beef mixture into 4 patties and cook to desired temperature
Blend 2 chipotles in adobo with ½ cup plain non-fat Greek yogurt to make chipotle sauce
Assemble burgers: place lettuce and tomato on sweet potato bun, add beef patty, top with cheese and chipotle sauce, then top bun
