• Preheat your oven to 350°F.
• Cook the lasagna noodles according to the package directions. Grab a large baking sheet, cover it with aluminum foil, and lay out those cooked noodles flat to cool. Set 'em aside for now.

For the Meat Sauce:

• Heat up a large skillet and brown your choice of meat over medium heat. Once it's cooked, drain off any excess fat. Stir in that yummy marinara sauce and let it simmer until it's nice and warm.

For the Cheese Sauce:

• In a good-sized bowl, mix together the ricotta cheese, beaten egg, 1 cup of mozzarella, ½ cup of parmesan, and fresh parsley.

Assembling the Roll Ups:

• Spread an even layer of the cheese sauce onto each lasagna noodle. You can use a flat spatula or the back of a spoon to make it nice and smooth.
• Now, take about ¾ of the meat sauce and spread it over each noodle, right on top of the cheese filling.
• Roll those lasagna noodles up nice and snug. Place the rolls in a casserole dish and cover them with the remaining meat sauce. Sprinkle the top with the rest of the parmesan and mozzarella cheese.
• Bake your lasagna roll ups for 20-25 minutes at 350°F. Cover the dish with aluminum foil for the first 15-20 minutes, then uncover and let it bake until that cheese is melted and bubbly.