Preheat your oven to 350°F (180°C) and prepare a baking sheet with parchment paper.
In a large bowl, mash together the roasted sweet potato and white beans. Mix in the chopped onion, garlic powder, nutritional yeast, red pepper flakes, parsley, lemon juice, salt, and black pepper until well combined.
Add the seasoned breadcrumbs to the mixture, ensuring an even distribution.
Divide the mixture into four equal parts and shape each into a patty.
Heat a drizzle of canola oil in a large skillet over medium heat. Cook each patty for about 3 minutes on each side until they are browned.
Transfer the patties to the prepared baking sheet and bake for 12-15 minutes until heated through.
Assemble the burgers by placing each patty on a bun and topping with chipotle mayonnaise, sliced avocado, and red onion.