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1
Heat the broiler to high and arrange a rack in the middle.
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2
Place a cooling rack inside a baking sheet and set aside.
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3
Heat a large frying pan over medium heat.
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4
Add bacon and cook until browned and crispy, about 10 minutes.
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5
Remove bacon to a paper-towel-lined plate and set aside; do not discard bacon fat (you should have about 2 tablespoons).
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6
Return the pan to medium heat, add onion and jalapenos, and cook in reserved bacon fat until soft and starting to color, about 4 minutes; set aside.
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7
Mix together Worcestershire, garlic, egg, salt, and pepper in a large bowl until egg is broken up.
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8
Add bison meat and mix until thoroughly combined.
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9
Shape meat mixture into 6 (3/4-cup) patties and place on the rack inside the baking sheet.
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10
Broil until browned and springy to the touch, about 10 minutes for medium.
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11
Place cheese on top of patties and cook until cheese melts, about 1 minute.
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12
To serve, place cheeseburgers on buns and top with bacon, avocado slices, and sauteed onion mixture.
