Three-Cheese Garden Pizza

1 package (13.8oz.) refrigerated pizza crust
1 tablespoon vegetable oil
2 garlic cloves, pressed
1 cup (4 ounces) shredded cheddar cheese
1 cup (4 ounces) shredded mozzarella cheese
1/4 cup (1 ounce) grated fresh Parmesan cheese
1 tsp. Italian seasoning
1 small onion, sliced into rings
2 plum tomatoes, sliced
1 medium Zucchini, sliced
1 cup sliced mushrooms

1.) Preheat oven to 400.  Unroll dough onto bottom of lightly greased 15 1/2 X 10 inch pan.  Gently stretch dough to evenly cover the bottom of the pan.  Place oil in small bowl.  Press garlic into the oil & brush evenly over the dough.  Bake crust 7 minutes.  Remove from the oven and place on cooling rack.
2.) Meanwhile, grate cheddar and mozzarella cheeses; place in a bowl and grate Parmesan cheese over the top.  Add Italian seasoning to the cheese mixture and toss lightly.  Slice onion, tomatoes, zucchini, and mushrooms.
3.) Sprinkle half of the cheese mixture evenly over crust; top evenly with onion, zucchini, tomatoes and mushrooms.  Sprinkle with remaining cheese mixture.  Bake 15-18 minutes or until crust is golden brown; remove from oven to cooling rack.  Cut into squares and serve!

Tip:  For best results, layer the vegetables over the pizza in the order described in step 3.