Preheat the oven to 375 degrees.
Heat the olive oil in a skillet on medium heat.
Place the Italian sausage and the ground beef in the skillet, breaking up the ground beef.
Add the onion and garlic.
Cook until the meat is browned, which should take up to 10 minutes.
Then add tomato paste, Italian seasoning, sugar, your preferred herbs, salt, and pepper to taste.
Stir well until combined.
Cover and let it simmer for between 1-2 hours. Don’t forget to stir occasionally.
Cook the lasagna noodles according to package instructions, which should take about 10 minutes.
Drain and rinse the noodles under cold water.
Set it aside for now.
Combine the ricotta cheese, mozzarella cheese, and parmesan cheese with two large eggs in a mixing bowl.
Add ⅓ tbsp. salt. Add the remaining Italian seasoning.
Spread ⅓ cup of meat sauce on the bottom of the casserole dish.
Follow by layering three lasagna noodles, with ⅓ of the cheese filling and 1 cup of meat sauce.
Repeat until you’re out of ingredients.
Cover with foil and bake for between 30-45 minutes.
Remove the foil and bake for another 20 minutes.
Let your ricotta cheese lasagna rest for 15 minutes.