It's dinner time!

Ingredients

• 1 pound ground beef
• ¼ cup chopped onion
• ¼ cup chopped green pepper
• ¼ cup chopped celery
• 1 ½ teaspoons distilled white vinegar
• 1 ½ teaspoons prepared yellow mustard
• 1 ½ teaspoons brown sugar
• ¾ teaspoon Worcestershire sauce
• ½ teaspoon garlic powder
• salt and ground black pepper to taste