Preheat the oven to 350°F.
In a small saucepan, melt 2 tablespoons butter over medium heat. Add the mushrooms, peppers and onions. Cook until the vegetables are tender, 5 to 6 minutes.
In a skillet, melt the remaining 2 tablespoons butter over medium heat. Add the sausage, breaking up with a wooden spoon, Canadian bacon, and pepperoni. Cook until the sausage is done and no longer pink. Add the cream cheese and stir to melt and combine. Stir in the Italian seasoning and bacon.
Spoon the mixture into a 1-quart baking dish. Bake until the dip is browned and bubbly, 30 to 35 minutes. Serve the dip with the Pizza Crust Dippers.
Pizza Crust Dippers:
Preheat the oven to 400°F. Spray 2 baking sheets with nonstick cooking spray.
On a clean, flat surface, unroll the dough. Brush the dough evenly with olive oil and sprinkle evenly with cheese. Using a pizza cutter, cut the dough into 2 by 3-inch rectangles. Place on the prepared baking sheets. Bake until lightly browned, 10 to 12 minutes.