Step 1

Preheat oven to 375 F.

Step 2

Bring a large pot of water to a boil over medium high heat. Add lasagna noodles, olive oil and salt and cook until al dente (fully cooked but still firm), or according to package directions, about 10 minutes. Rinse the noodles under cold water to stop the cooking process and set aside in the pot.

Step 3

Heat oil in a large saucepan for 2 minutes over medium-high heat until the oil is sizzling hot. Add onion and garlic and sauté until fragrant, about 2 minutes.

Step 4

Stir in chicken broth and flour and whisk until smooth and uniform. The sauce might initially be a little clumpy.

Step 5

Whisk in heavy cream and bring the sauce to a simmer over medium heat. Let it simmer, stirring occasionally until thickened, about 5-8 minutes. The sauce should be similar in consistency to a gravy and be thick enough to coat the back of a spoon.

Step 6

Remove from heat and stir in spinach. Set aside.

Step 7

In a medium bowl, combine ricotta cheese, 1 cup mozzarella, Parmesan, beaten egg, and parsley. Stir well to combine together. Set aside.

Step 8

Evenly spread 1/2 cup of the sauce in a 9x13 baking pan. Place 3 lasagna noodles evenly apart over the sauce. Spread 1/3 of the sauce evenly over the noodles. Sprinkle half the shredded chicken evenly over the sauce. Spread 1/4 of the ricotta cheese mixture on top.

Step 9

Add another layer of 3 lasagna noodles. Spread half of ricotta cheese mixture on top.

Step 10

Add another layer of 3 lasagna noodles. Spread 1/3 of the sauce evenly over the noodles. Sprinkle remaining half of shredded chicken evenly over the sauce. Spread remaining 1/4 of the ricotta cheese mixture on top.

Step 11

Add remaining 3 lasagna noodles. Add remaining 1/3 sauce on top. Top with remaining cup of mozzarella.

Step 12

Lightly grease a large piece of aluminum foil and cover the pan with the greased side inside. Greasing the foil prevents the melted cheese from sticking to the foil while baking. Bake the lasagna covered for 45 minutes.

Step 13

Remove the foil and bake uncovered for another 20 minutes or until the melted cheese turns golden brown and bubbly. Optionally, turn on broiler on high and broil for 3-4 minutes to get a crispy and brown cheesy crust. But keep a close eye on the broiler as things can burn quickly.

Step 14

Let the lasagna cool for at least 15 minutes before slicing. This ensures that the sauce sets and isn't runny when you cut into the lasagna.