Preheat the oven to 350℉. Cook the lasagna noodles according to package instructions, rinse in cold water and set aside.
Heat a large frying pan or dutch oven over medium high heat, add the ground beef, sausage, onion and garlic. Brown until cooked through and no longer pink, drain and add back into the pan.
Stir in the pasta sauce, salt, pepper, crushed red pepper and Italian seasoning. Simmer over medium low heat for 5-10 minutes, stirring occasionally. Remove from heat when thickened.
In a medium sized mixing bowl, mix together the ricotta cheese, egg, half of the shredded mozzarella and half of the grated parmesan cheese.
Spread ½ Cup of the sauce onto the bottom of a 9x13 baking dish. Lay 3 cooked lasagna noodles over the sauce. Spread ⅓ of the ricotta mixture over the noodles. Add 1 cup of the sauce over the ricotta. Repeat twice, finish assembling the lasagna with 3 more noodles and the rest of the sauce.
Cover with foil and bake for 40 minutes.
Remove the foil and sprinkle on the rest of the mozzarella cheese and parmesan cheese. Bake for another 10 minutes or until the cheese has melted and is lightly browned.
Let the lasagna rest for at least 10-15 minutes before cutting and serving. Garnish with fresh parsley and enjoy!.