INGREDIENTS
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1 pound ground round
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1 1/4 cups chopped green bell pepper
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1 1/4 cups chopped celery
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1 cup chopped onion
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3 garlic cloves, minced
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1 cup water
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1 cup ketchup
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1 tablespoon brown sugar
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1 tablespoon fresh lemon juice
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1 tablespoon red wine vinegar
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1 teaspoon paprika
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2 teaspoons Worcestershire sauce
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1 teaspoon Dijon mustard
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1/4 teaspoon fennel seeds
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1/4 teaspoon hot pepper sauce
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1 (8-ounce) package presliced mushrooms, chopped
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6 (2-ounce) Kaiser rolls or hamburger buns, toasted