Lemony Squash Galette

LEMONY SQUASH GALETTE11 c. thinly sliced zucchini and yellow squash1 lemon½ of a (14.1-oz.) pkg. rolled refrigerated unbaked pie crust (1 crust)¾ c. ricotta cheese½ c. grated parmesan cheese¼ c. shredded mozzarella cheese1 T. minced garlicSalt, black pepper1 T. olive…