In a large skillet heat olive oil over medium-high heat. Add ground beef and brown while breaking into small pieces. Season with salt and pepper. When beef is almost no longer pink, add in chopped onion & celery. Sauté 3-4 minutes until celery & onion are tender.
1 tbsp. olive oil, 1 # ground beef, ½ tsp. salt, ¼ tsp. black pepper, ½ cup celery, ½ cup white onion
Add in chicken gumbo soup, ketchup, mustard and brown sugar. Reduce heat to medium-low and simmer for 10 minutes.
10.5 oz. can condensed chicken gumbo soup, ½ cup ketchup, 2 tbsp. yellow mustard, 1 tbsp. brown sugar
To serve, place a scoop of sloppy joe mixture on a fresh hamburger bun. Top with top bun. Enjoy!