Philly Cheesesteak Pizza

homemade or store-bought pizza crust (I used Miracle Dough)

homemade or store-bought alfredo sauce (see recipe below)

mozzarella cheese

cooked chopped or diced steak (see note)

bell pepper, sliced into thin strips (I used ¼ red pepper, and ¼ green pepper)

onion, thinly sliced

butter

flour

milk or half & half (I use fat free half & half - works great!)

shredded parmesan cheese (not the canned stuff)

garlic powder

salt

pepper