Entirely Elizabeth

0 To a large oiled skillet, add the ground beef, green bell pepper, yellow onion, and garlic. Cook over medium to high heat until beef is browned and crumbled, about 5 minutes.NOTE: Drain excess grease and moisture from the ground beef mixture and discard. 
1 To a large measuring cup or bowl add tomato paste, ketchup, water, brown sugar, Dijon mustard, chili powder, Worcestershire sauce, salt and black pepper. Stir well to combine.
2 Pour liquid into the ground beef mixture and stir well to combine. Cook over medium heat for 5 minutes until thickened. Remove from heat and set aside to slightly cool.
4 Preheat oven to [wprm-temperature value="375" unit="F"] and prepare a 9x13 baking dish with non-stick cooking spray.
5 Place the bottom slider buns in the prepared baking dish and top with 5 slices of colby jack cheese, the slightly cooled sloppy joe sauce, the remaining 5 slices of cheese, and finally the top slider buns.NOTE: The cheese placement is important because it creates a moisture barrier which will keep the buns from getting too soggy.
6 Brush the top slider buns with melted butter and tightly cover the baking pan with aluminum foil.
7 Bake the sliders for 15 minutes. Uncover and continue to bake them for an additional 5 minutes, or until the buns are toasty and the cheese is melty. 
8 Remove from the oven and allow them to rest for 5 minutes before serving.