Position oven rack to the middle and preheat to 350 F.
In a large mixing bowl, combine all ingredients for cheese mixture. Set aside.
Heat your large pan or pot to medium. Add sausage meat. Brown and crumble with a spatula until minimal pink remains. Drain excess fat.
Reduce heat to medium-low. Add sauce, cover, and let simmer for 10-minutes.
Add spinach and mix until wilted.
Break up your lasagna noodles into 2-3-inch chunks and stir into sauce. Make sure you're only using half the package.
Pour this into your baking dish. Gently spread the mixture throughout and make sure noodles are submerged under sauce.
Dollop cheese mixture throughout the baking dish. Sprinkle with extra mozzarella if desired.
Cover with tin foil and bake for 30-minutes. Remove tin foil, and bake for another 10 minutes or until cheese is bubbling and noodles are cooked through. Finish under broiler for 2-5 minutes to brown the cheese, watching closely to prevent burning.
Let it rest for 10-minutes before eating. Serve with extra parmesan and fresh basil, if desired.
Notes
A package of lasagna noodles should be about 375 g - 1 lb. Use half.Nutrition facts calculated with Italian turkey sausage, and without extra mozzarella on top.Storage and re-heating: High protein lasagna will stay good in the fridge for up to 3 days, or in the freezer for up to 3 months. Sprinkle with water before re-heating on the stove or in the microwave.