White Lasagna with Chicken, Spinach & Mushrooms.

3 boneless skinless chicken breast
1 10 oz package fresh spinach
2 cups fresh mushrooms, slicedx
1 whole yellow onion, sliced
1/2 tablespoon garlic
4 cups heavy cream
1 stick butter
1/2 cup flour
1 box "no boil" lasagna noodles
3 cups shredded parmesan
1 package italian blend shredded cheese
1/2 tablespoon dried oregano
salt & pepper to taste
olive oil for cooking

For the chicken:
Preheat oven to 350 degrees.
Season the chicken generously with the blackening seasoning. 
Heat a cast iron skillet over high heat for 2 minutes then place the chicken in the skillet and blacken on each side. About 2 minutes per side. Then place the skillet in the oven and cook for 10 minutes. Set aside to cool, then shred.
For the sauce:
Turn oven up to 375 degrees.
Heat about 2 tablespoons of olive oil in a large saute pan over med/high heat. Add about 1/2 the spinach and let cook down a bit then add the rest. Remove from pan and set aside.
Add an additional tablespoon of olive oil to the pan. Now add garlic and onions, cook for about 3 minutes then add the mushrooms and cook until tender. Add the spinach and set aside.
In a large sauce pan, heat 5 tablespoons of butter over medium heat. Add the flour and whisk constantly to make a roux. Next, slowly add the heavy cream while whisking constantly. Season generously with salt & pepper and add the dried oregano. Let simmer appox 10 minutes then add 2 cups of the parmesan. Mix well and then add the onion, mushroom and spinach mixture.
To assemble the lasagna:
Spoon a small amount of the sauce on the bottom of a 9x13 baking dish.
Place 4 of the lasagna sheets horizontal in the dish.
1/2 of the shredded chicken
roughly 1 1/2 cups of the sauce
a generous handful of the italian blend cheese and 1/2 of the remaining parmesan.
REPEAT this step for the second layer.
The third layer will not contain chicken.
Ending with the shredded cheese on top.

*Using the remaining butter, cut into spall cubes and evenly place on top of the cheese*

I added some shredded mozzarella on the top to make it extra cheesy...!!!

Bake covered for 45 minutes, remove cover and continue to cook until browned & bubbly.