Put olive oil to your pan and add ground beef. Cook until all the pinkness is gone. Med heat
Add onion to ground beef and start to stir and cook them. Med heat
Add tomato paste to your mix when onions and ground beef start to fry (listen for frying sound) and then tomato puree med heat
When the sour taste or raw smell is gone for tomato puree add minced garlic med heat
Add your planed carrot and bay leaves to your mix and season with enough amount of salt and freshly ground black pepper. (you can add green herbs as well if you desire) low heat
Stir them until they cook (it will take at least 20 mins with low heat) and also add water at least 200 ml (add more if you like juicy bolognese)
Put butter and olive oil to your pan and add 3 table spoon of flour fry 1 min in med heat
Add little little milk and stir well you can add nutmeg and freshly ground black pepper (or white pepper) then cook until it starts to boil. Wait a little bit and use your bechamel warm not hot!
Put a little bit of olive oil and a tablespoon of bolognese sauce to your pyrex (glass or porcelain tray) and put a layer of instant or homemade lasagne
Add bolognese sauce over a layer of lasagne and bechamel sauce and make 3-4 layer (the ideal for Italians 3 layer)
Add desired cheses or just bechamel on the top and put in preheated oven 180-200C (350-400F) for 25 minutes (it depends on oven)
Cook until all the cheese has melted or start to change colour (fried) on edges
