Preheat oven to 425. Spray a 13x9 pan with cooking spray.
Cook turkey sausage and onions in a skillet over medium-high heat until turkey is no longer pink; drain. Add tomatoes and mix well.
Line pan with pizza crust and top with meat mixture. Bake uncovered for 12 minutes. Top with cheese and bake for 5 more minutes. Cool slightly before serving.
2007...2014, 2015, 2016