Mustard BBQ sauce pizza with smoked pork

First, make Mustard BBQ Sauce;
Ingredients
    * 4 Tbsp. butter
    * 1/2 onion, grated
    * 1/2 cup yellow mustard     * 1/2 cup brown sugar
    * 1/2 cup apple cider vinegar
    * 1 Tbsp dry mustard     * 1 teaspoon cayenne
    * 1 bay leaf
    * Salt to taste
- Heat the butter over medium heat until it's frothy, then add the onion and sauté for 3-4 minutes. Do not let the onions brown.
- Add everything else, stir well and simmer slowly for 30 minutes or more.
-Chill before using.
Prepare desired pizza dough, then;
-Preheat oven or grill to 500 degrees (if using a stone, make sure it's on the bottom rack)
-cover dough w/ BBQ sauce like you would pizza sauce
-sprinkle with chopped onions and green peppers
-lightly cover w/ mozzarella cheese
-cover cheese with thinly sliced smoked pork (can use ham or pulled pork as well)
-cover with more cheese
-Bake till crust is nice and crisp and cheese golden brown and bubbly
-Top slices with freshly made coleslaw