- 4 hamburger buns
- 1 cup sweet potatoes, cut into 1/2-inch cubes
- 1 cup cooked quinoa
- 1/2 cup panko (Japanese-style bread crumbs)
- 1 large egg
- 1 tsp fresh garlic, minced
- 1 tsp cumin
- 1 tsp paprika
- 1 tsp kosher salt
- 1/2 tsp freshly-ground black pepper
- 1 medium-sized red onion, sliced into 1/4-inch thick rings
- 2 tbsp olive oil
- 1/2 tbsp balsamic vinegar
- 1/2 cup blue cheese, crumbled
- Bring a large pot of water to a boil, then add the sweet potatoes and cook, stirring occasionally, until fork tender, about 15-20 minutes. Drain and set aside to cool.
- In a large mixing bowl, stir together the sweet potatoes, quinoa, panko, egg, garlic and spices until well combined. Form into four flat patties, about 3/4-inch thick.
- Heat 1 tbsp of the olive oil in a griddle or large skillet over medium-high heat. Cook the patties until they reach a deep golden brown and are cooked through, 4-5 minutes per side.
- While the patties are cooking, heat the remaining olive oil in a medium skillet over medium-high heat. When the oil begins to shimmer, add the balsamic vinegar, and stir to combine. Add the onion slices to the skillet, leaving a bit of room between each. Cook for 3-5 minutes, flipping once, until the onions have softened.
- Top each bun with a burger, and divide the onion rings and blue cheese among them. Top with desired condiments and serve warm.