Preheat the oven to 350°F.
In a large skillet over high heat, brown the ground beef, onions, and bell pepper until the beef is cooked through and the onions and peppers are soft. Drain the fat and juices from the meat.
Dice 4 ounces (about 2/3) of the provolone cheese. Mix the diced provolone, softened cream cheese, milk, garlic powder, onion powder, salt, and pepper into the ground beef mixture.
Transfer the mixture to a casserole dish and cover the top of the meat mixture with the remaining thinly sliced provolone cheese.
Bake at 350°F for 10 to 15 minutes, or until the cheese is melted. Optional: turn the oven to broil for 2 to 3 minutes or until the cheese gets slightly browned and bubbly on top. Watch carefully so as not to burn the cheese!
Garnish with freshly chopped parsley if desired. Serve warm. Enjoy!