Easy Baked Manicotti

2 cups spaghetti sauce, divided

1 egg, lightly beaten

1 3/4 cups Parmesan cheese, grated

1/4 cup pesto

12 manicotti shells, cooked, rinsed in cold water

Spread 3/4 cup spaghetti sauce on bottom of 9 x 13-inch baking dish. Mix egg, cheeses, and pesto until well blended. Spoon cheese mixture into large resealable plastic bag. Using scissors, cut a small hole in one corner of the bottom of the bag. Fill manicotti shells, one at a time, squeezing cheese mixture into both sides of the shell. Place manicotti over sauce in baking dish. Pour remaining 1 1/2 cups spaghetti sauce over manicotti. Cover with foil. Bake at 350 degrees for 40 minutes or until heated through.