Preheat your oven to 375 degrees Fahrenheit. Lightly grease a 9×13 inch baking dish.
Brown the ground beef or sausage in a large skillet over medium heat. Drain off any excess grease. Stir in the marinara sauce and simmer for 5 minutes.
In a medium bowl, combine the cottage cheese, egg, Parmesan cheese, Italian seasoning, salt, and pepper. Mix well until everything is incorporated. This is your high protein layer.
Spread about 1 cup of the meat sauce mixture on the bottom of the prepared baking dish.
Arrange three lasagna noodles over the sauce, slightly overlapping if necessary.
Spread half of the cottage cheese mixture evenly over the noodles.
Sprinkle one-third of the mozzarella cheese over the cottage cheese layer.
Spoon another 1 cup of meat sauce over the mozzarella.
Repeat the layers: three noodles, the remaining cottage cheese mixture, one-third of the mozzarella, and another cup of meat sauce.
Top with the final three noodles, the remaining meat sauce, and the remaining mozzarella cheese.
Cover the baking dish tightly with aluminum foil.
Bake for 25 minutes. Remove the foil and bake for an additional 15 to 20 minutes, or until the cheese is melted and bubbly and the lasagna is heated through.
Let the lasagna rest for 10 minutes before slicing and serving.
Notes
Using oven-ready noodles makes this an easy lasagna recipe, saving you time on boiling pasta.
For an extra flavor boost, you can mix 1/4 cup of finely chopped fresh parsley into the cottage cheese mixture.
If you prefer a less tangy flavor, use full-fat cottage cheese.