Sloppy Joe Sliders

Name: Sloppy Joe Sliders
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 1-1.25 pounds ground beef; 1 small yellow onion (chopped); 1 celery rib (chopped); 1/3 cup green pepper (chopped (about ½ a medium pepper)); ¾ cup ketchup; 1 tablespoon yellow mustard (prepared); 1 tablespoon Worcestershire sauce; ¼ cup water; One package sweet Hawaiian dinner rolls; Cooking spray