Preheat oven to 400 degrees F. Lightly brush 1 tsp. of the oil on pan. Unroll dough onto bottom of pan, gently stretching and pressing dough to cover bottom. Add pressed garlic to 1 Tbsp. oil and brush evenly over dough. Bake crust 7 minutes.
Slice onion, tomatoes, zucchini, and mushrooms thinly.
Remove pan from the oven. Sprinkle half of the cheese mixture evenly over crust; layer with onion, zucchini, tomatoes and mushrooms - in that order. Sprinkle with remaining cheese mixture. Bake 15-18 minutes or until crust is golden brown. Cut into squares.