Heat mozzarella and cream cheese in a non-stick pan over medium heat or in a bowl in the microwave oven. Stir until they melt together. Add the other ingredients and mix well. Tip: use a hand mixer with dough hooks.
Moisten your hands with olive oil and flatten the dough on parchment paper, making a circle about 8" (20 cm) in diameter. You can also use a rolling pin to flatten the dough between two sheets of parchment paper.
Remove the top parchment sheet (if used). Prick the crust with a fork (all over) and bake in the oven for 10–15 minutes until golden brown. Remove from the oven.
While the crust is baking, sautée the ground sausage meat in olive oil or butter.
Spread a thin layer of tomato sauce on the crust. Top the pizza with meat and plenty of cheese. Bake for 10–15 minutes or until the cheese has melted.