Cook lasagna sheets as per package instruction until al dente.
12 pieces lasagna sheets
In a large skillet, heat oil over medium heat. Sweat onion and garlic (cook just until limp, do not caramelize).
1 tablespoon oil, 1 medium onion, 3 cloves garlic
Add ground beef and break up the lumps with a spatula. Season with salt, pepper, dried oregano, and dried basil. Cook until no longer pink. Then stir in the bell peppers.
500 grams ground beef, salt, ½ teaspoon ground pepper, 1 teaspoon dried oregano, 1 teaspoon dried basil, ½ cup bell pepper
Add the pasta sauce and tomato paste. Check if it needs more seasonings. Bring to a simmer then turn off the heat. Set aside.
1 can pasta (marinara) sauce, 2 tablespoon tomato paste
In a bowl, add cream cheese/ricotta, mozzarella cheese, and chopped parsley. Mix together until well combined.
1 package cream cheese, 1 cup mozzarella cheese, ¼ cup parsley
Take ½ cup of the meat sauce and spread it over the bottom of a baking dish.
In a baking sheet, line up the cooked lasagna noodles. Divide and spread the cheese mixture on top of each noodle. Then scoop a tablespoon of the meat sauce and spread it on top of the cheese mixture.
Roll up the noodles and arrange them, seam side down, on the prepared baking dish. Top the rolls with the remaining meat sauce and sprinkle with more mozzarella cheese.
Bake for 30-40 minutes in a preheated oven at 375°F/190°C or until the cheese has melted then broil (top heat at high) for 2-3 minutes or until the cheese is lightly golden brown.
Garnish with chopped parsley and serve.