Preheat oven to 450ºF and grease a pizza pan, stone or sheet tray.  Cook sausages, breaking up with the back of a spoon, until browned and cooked through.

Stretch pizza dough across pan using a bit of flour if the dough is too sticky to handle. Aim for an even layer. Spread pizza sauce over dough and top with cooked chicken sausage, cheese, fresh spinach, and tomatoes.

Bake for 8-10 minutes, until the bottom of the crust is brown and crispy and the cheese is melted. Sprinkle with fresh basil (if desired) and drizzle with olive oil just before serving.