HEAT oven to 350ºF.
BLEND first 4 ingredients in blender until smooth. Spoon 1/2 cup into 8-inch square baking dish. Combine remaining sauce with remaining vegetables.
PREPARE Dinners as directed on package; stir in egg and 1/2 cup mozzarella. Spoon half over sauce in dish; top with layers of half the vegetable mixture and 1/4 cup of the remaining mozzarella. Repeat layers.
BAKE 30 min. Top with remaining mozzarella; bake 5 min. Let stand 5 min. before serving.