Cook lasagna noodles al-dente
While noodles are cooking, spray pan with olive oil spray and cook sausage until browned and no pink remains. Remove from heat, drain, and let cool slightly.
Preheat oven to 350
Combine cooked sausage, spinach, ricotta, Parmesan, HALF of the mozzarella, egg, salt, black and red pepper (if using) in a medium bowl.
Place a piece of wax or parchment paper on the counter and lay out lasagna noodles. If necessary, pat noodles dry with paper toweling.
Add 1 cup of sauce to the bottom of a 9x12 baking dish
Take about 1/3 cup of sausage mixture and spread evenly over one noodle. Repeat until all noodles are covered. Roll each noodle carefully and place seam side down into the baking dish.
Ladle 1-2 T of sauce over top the roll ups in the baking dish. Sprinkle remaining 1/2 cup of mozzarella cheese over noodles.
Cover and bake for 25-30 minutes, or until cheese melts. Uncover for the last few minutes if desired.