INGREDIENTS
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2 lbs skirt steak
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1 1/2 tsp dried Italian seasoning
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1/4 tsp crushed red pepper flakes
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sea salt and black pepper, to taste
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3 tbsp butter
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2 large onions, thinly sliced
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2 large cloves garlic, minced
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2 tbsp Worcestershire sauce
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1/2 tsp dried thyme
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3/4 cup beef stock
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1/4 cup sour cream
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2 tbsp dijon mustard