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1
Preheat the oven to 375 degrees F.
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2
Smash the garlic cloves, sprinkle with some salt, and, with the flat side of a large knife, mash and smear the mixture to a coarse paste.
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3
Whisk the garlic with the balsamic, Worcestershire, and hot sauce in a small bowl.
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4
Crumble the turkey and beef into a large mixing bowl.
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5
Pour the garlic mixture over the meat and form into 4 (5-ounce) burgers.
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6
Cover and set aside while you cook the onions.
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7
Meanwhile, heat 1 tablespoon of the olive oil in a skillet over medium-high heat.
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8
Add the onion and cook, stirring occasionally, until browned but not mushy, about 15 minutes.
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9
Season the onions with the remaining teaspoon of balsamic and salt and pepper, to taste.
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10
Heat a large nonstick skillet over medium-high heat for a minute.
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11
Brush 1 side of the burgers with the oil and season with salt and pepper, to taste.
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12
Cook seasoned side down until browned, about 2 minutes.
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13
Brush and season the top of the burgers, flip and cook until other side is brown, about 2 minutes more.
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14
Transfer burgers to a baking dish and bake until an instant-read thermometer inserted side ways into the burgers registers 160 degrees F, about 5 minutes.
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15
Place the burgers on the buns or in pita and let rest for a few minutes.
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16
Serve with the caramelized onions and garnishes of your choice.
