Preheat oven to 350 degrees
Mix the ricotta and pesto together in a bowl
Spray a 13 x 9 pan with cooking spray.
Build the lasagna by first spreading approx 1/2 of one jar of vodka sauce
Layer four noodles on top
Next spread 1/3 of the ricotta and pesto mix
Then 1/3 of the spinach
1/4 of the shredded cheese.
Layer four more noodles
Pour the 2nd half of the 1st bottle of vodka sauce.
1/3 ricotta & pesto mix
1/3 spinach
1/4 of shredded cheese
4 more noodles
1/2 of the 2nd jar of vodka sauce
Remaining ricotta & pesto
Remaining spinach
1/2 of the remaining shredded cheese
Final layer of noodles
The remaining vodka sauce
Remaining shredded cheese.
Cover with foil (remove for last 10 minutes)
Bake for 35-40 minutes