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1. Preheat oven to 350°F. Toss potato rounds with ½ tbsp oil, salt and pepper. Roast on a parchment-lined baking sheet for 10 minutes per side until softened.
2. In a bowl, combine bison, garlic powder, onion powder, chile powder, black pepper, cumin and salt. Form into 6 patties. In a large cast iron skillet on medium-high, heat remaining ½ tbsp oil. Cook patties 4 to 5 minutes per side.
3. Combine avocado, cilantro and lime juice. Place each burger and a dollop avocado mixture between 2 potato rounds.