"Make your favorite sandwich without the carbs...."
INGREDIENTS
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2 tbsp. vegetable oil, divided
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1 large onion, thinly sliced
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2 large bell peppers, thinly sliced
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1 tsp. dried oregano
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kosher salt
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Freshly ground black pepper
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1 lb. skirt steak, thinly sliced
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1 c. shredded provolone
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8 large butterhead lettuce leaves
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1 tbsp. chopped parsley