See below

Prepare filling. Filled uncooked Manicotti using a tsp. or small
rounded knife. Pour a little hot sauce in bottom of baking pan &
arrange Manicotti in single layer side by side. Add hot sauce to
completely cover; cover baking dish with foil, crimping edges to seal
tightly. Place in preheated 400 oven & bake 40 minutes. Remove foil,
sprinkle grated cheese on top & bake another 5-10 minutes.