Spread cream cheese on flatbread, sprinkle with green onions, flake crab into smaller pieces and place on top of cream cheese/onion mixture. Sprinkle with mozzarella cheese.
Bake for 10-12 minutes directly on your oven rack (or grill) until cheese is melted and crust is crispy.
Drizzle/dot sweet and sour sauce around the top. (I usually just dip a fork into jarred sauce and drizzle onto pizza)