combine thawed spinach (moisture squeezed out), ricotta cheese, egg, parsley and season with salt and pepper
stir to combine
Add in mozzarella cheese, Asiago cheese, Parmesan cheese and Romano cheese.
place cooked lasagna noodles on parchment or wax paper
Spread 1/4 cup of the cheese mixture evenly along length of the noodles
add Italian sausage (optional)
Roll noodles up jelly roll style to opposite end.
Pour about 1 cup of the marinara sauce into the bottom of a 9×13 inch baking dish and place rolls on top
cover the top with remaining marinara sauce and sprinkle with remaining cheese.
Bake in preheated oven 30-35 minutes, or until heated through