Mark's Nearly Famous Sloppy Joes

INGREDIENTS

• 2 1/2 pounds ground beef
• 1 large onion, chopped
• 1/4 green bell pepper, chopped
• 2 stalks celery, chopped
• 1 (10.75 ounce) can condensed chicken gumbo soup
• 1 (6 ounce) can tomato paste
• 2 tablespoons brown sugar
• 4 tablespoons lemon juice
• 1 1/2 tablespoons yellow mustard
• 1/2 cup ketchup
• 1/2 cup barbecue sauce
• 6 tablespoons white vinegar
• 2 tablespoons Worcestershire sauce
• 1 teaspoon liquid smoke flavoring
• 1/2 teaspoon dried parsley
• 1/2 teaspoon black pepper
• 1 teaspoon salt