Preheat oven to 350°F.
In a large bowl, combine mozzarella, chopped asparagus, shredded chicken, and crumbled bacon.
Stuff manicotti with chicken mixture. When stuffing the noodles, hold one end closed and stuff the open end until filled. Place in a greased 8x8-inch pan.
In a saucepan, melt butter over medium heat. Add garlic and cook until fragrant (about 1 minute).
Add lemon juice, heavy whipping cream, 1 cup of the parmesan, and black pepper. Cook until heated through (about 5 minutes).
Drizzle sauce over stuffed noodles.
Bake 15 minutes, or until bubbly.
Top with remaining parmesan cheese and fresh parsley.