Preheat oven to 350°F. Line a large baking sheet with foil or parchment, If using foil, spritz lightly with cooking spray. Set aside.
In a large deep 12 inch skillet cook ground beef, red pepper and green pepper in a few drizzles of olive oil. Cook over medium-high heat until no pink remains. Add garlic, cooking for 1 minute longer. Drain excess fat from pan.
Lower heat to medium. Add tomato sauce, ketchup, worcestershire sauce, mustard, brown sugar, seasoned salt, paprika, pepper and granulated garlic. Mix until combined. Simmer for 5-10 minutes until blended. Remove from heat.
Meanwhile, slice bread in half. Remove some of inside of each half. (Freeze for use with another recipe.)
To assemble: Arrange 5 slices of cheese on bottom piece of bread. Spread with sloppy joe beef. Top with remaining cheese, placing second piece of bread on top.
Lay a piece of foil loosley on top. Bake for 20 minutes then remove baking uncovered for another 5 minutes.
Rest for 5 minutes, then slice and serve.