INGREDIENTS
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1 tbsp. vegetable oil
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1 onion, chopped
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1 lb. ground beef
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kosher salt
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Freshly ground black pepper
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1-2 tbsp. yellow mustard
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1-2 tbsp. ketchup
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2 (8-oz) tubes Crescent Rolls
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6 slices cheddar cheese, halved
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1/3 c. dill pickle chips
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1 egg, beaten with 1 tablespoon water (for egg wash)
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Sesame seeds (untoasted), for garnish