01 -
Cook manicotti shells according to package directions until just tender, being careful not to overcook.
02 -
Drain cooked pasta carefully and lay shells individually on parchment paper to prevent sticking.
03 -
Allow shells to cool completely to room temperature for easier handling when filling.
04 -
Preheat oven to exactly 350°F and prepare baking dish by coating with non-stick spray.
05 -
Spread thin layer of marinara sauce evenly across bottom of prepared baking dish.
06 -
Combine ricotta, mozzarella, Parmesan, eggs, parsley, salt and pepper in large bowl until well mixed.
07 -
Transfer cheese mixture to pastry bag or plastic bag with corner snipped for easy filling.
08 -
Carefully pipe cheese filling into each end of manicotti shells until completely full.
09 -
Arrange filled shells in single layer in prepared baking dish.
10 -
Pour remaining marinara sauce evenly over filled shells, ensuring all pasta is covered.
11 -
Cover dish tightly with aluminum foil to trap moisture while baking.
12 -
Bake covered for exactly 40 minutes until filling is hot throughout.
13 -
Remove foil and sprinkle additional mozzarella cheese over top if desired.
14 -
Return to oven uncovered for 5-10 minutes until cheese melts and browns slightly.
15 -
Let rest 5 minutes before serving garnished with fresh parsley.