INGREDIENTS
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1 1/2 pounds lean ground beef
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2 tablespoons onion, finely chopped
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1 egg
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1/3 cup panko bread crumbs
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1/2 cup grated cheddar cheese
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1/2 teaspoons fresh ground black pepper
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1.5 oz cheddar, cut into 10 small cubes
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1 cup prepared macaroni and cheese, chilled (I used this Quick Stove Top Mac & Cheese Recipe)
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2 tablespoons barbecue sauce (optional)