Chipotle BBQ Sauce:
Melt butter in large saucepan. Add the garlic, tomato paste and water. Stir until tomato paste dissolves. Add the chopped chipotle peppers (seeds removed), peppers and sauce to the pan. Stir to combine. Add the remaining ingredients and simmer for about 30 minutes.
Strain and set aside.
Thinly slice the red onions. Melt butter in skillet and add garlic, onions and salt and pepper, to taste. Cook stirring occasionally until wilted. Add 1 cup Chipotle BBQ sauce simmer for 30 minutes.
Cut the root ends off the scallions. Brush with olive oil and place on grill. Grill both sides until grill marks appear. Remove from the grill to a cutting board. Chop and set aside.
Place ground beef in a bowl and add chopped scallions, about 1 tablespoon salt and 1 tablespoon ground pepper. Mix together and form into patties about 1/2-inch thick.
Wrap 1 slice applewood bacon around each patty and place on grill, about 5 to 6 minutes on each side for medium-well. Top burgers with cheese the last minute of cooking. Place on platter, cover with foil and set aside.
Heat oil in a deep-fryer to 350 degrees F. Cut the onions into 1/4-inch thick slices and place in large bowl. Put flour, cornmeal, and 2 tablespoons salt in another bowl. Whisk the eggs in a small bowl, add to the onions and stir to evenly coat. In batches, place the onions in flour mixture and toss until well coated.
Fry in oil until golden brown and set aside on paper towels to drain. Sprinkle with salt.
Toast kaiser rolls. Place 1/4 cup caramelized onions on bottom bun. Add burger patty and top with fried onion rings.
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