In a large pot, heat the olive oil over medium-high heat. Add the beef to the pot and brown it.
3 tbsp olive oil, 400 g ground beef
Meanwhile, chop the onion, celery, and carrot into small pieces. Grate the garlic finely. Add the chopped vegetables to the pot with the beef and sauté for about 5 minutes.
1 onion, 1 carrot, 1 stalk celery, 3 cloves garlic
Add the tomato paste to the pot and sauté for a few minutes.
40 g tomato paste
Add water, red wine, stock cubes, chopped tomatoes, salt, sugar, pepper, and oregano to the pot. Reduce the heat and let the sauce simmer covered for about 20 minutes.
3 dl water, 2 dl red wine, 1 ½ beef stock cube, 2 cans chopped tomatoes, 1 ½ tsp salt, 2 tsp sugar, Pepper, 1 tsp oregano
Preheat the oven to 200 degrees Celsius on conventional heat. Meanwhile, prepare the béchamel sauce.
Melt the butter in a pot and add the flour, sauté for a few minutes over medium heat. Gradually add the milk while whisking. When all the milk has been added and the sauce is simmering and has thickened, add salt, pepper, and ground nutmeg.
30 g butter, 3 tbsp all purpose flour, 5 dl milk, ½ tsp salt, Pepper, ¼ tsp ground nutmeg
Set the béchamel sauce aside.
In an ovenproof dish, place uncooked penne pasta on the bottom, pour the meat sauce over it, and mix it thoroughly. Evenly distribute it in the dish.
400 g penne pasta
Then spread the béchamel sauce on top and place the dish in the middle of the preheated oven and bake it for about 40 minutes. After 40 minutes, sprinkle grated parmesan on top and bake it for an additional 10 minutes or until the cheese is melted and golden.
70 g parmesan cheese
Remove the finished lasagne from the oven and let it rest for 5 minutes before serving.
Serve as a standalone dish or with a green salad on the side.