1. Preheat oven to 400° F. Line two ¼ sheet pans with liners; lightly flour liners.
2. Cook chicken in a sauté pan over medium-high heat for 4-5 min, or until cooked through. Break up chunks with a sauté spoon.
3. Roll out one ball of pizza dough on a lightly floured surface and stretch the dough to fill one pan. Repeat with second dough and second pan.
4. In a medium bowl, combine seasoning with crushed tomatoes. Spread evenly over dough in each pan, leaving an edge for crust. Sprinkle on cheese.
5. Slice pepper. Top pizzas with cooked chicken, pepper, and mushroom slices.
6. Bake on bottom rack for 15 min, or until cheese is melted and edges start to turn golden.
