Baked Manicotti

2 cups spaghetti sauce, divided (I use more)
1 egg, lightly beaten
1 3/4 cups ricotta cheese
1 1/2 cups shredded mozzarella cheese
1/2 cup grated parmesan cheese
1/4 cup pesto (I found it in the deli section)
12 manicotti shells, cooked, rinsed in cold water, drained

PREHEAT oven to 350. spread 3/4 cup of spaghetti sauce on bottom of 13x9 inch baking dish. Mix egg, cheeses, and pesto until well blended. Spoon cheese mixture into a large ziploc bag. Using scissors, cut off a small hole from the bottom corner of the bag.
FILL manicotti shells, one at a time, squeezing cheese mixture into both sides of each shell (If you're having problems with this, cutting the hole bigger helps). Place filled manicotti over sauce in baking dish; pour remaining spaghetti sauce over manicotti. Cover with foil!!!
BAKE 40 min. or until heated through. Optional: sprinkle with additional parmesan cheese before serving.