This is my recipe:

Meat bit:
500g mince beef
1 tin diced tomatoes
1 tin whole tomatoes
various vegies any or all of fresh tomatoes, capsicums, onion, mushrooms, zucchini
1/2 tsp sugar
1/2 tsp salt (I usually use less!)
1 clove garlic (I usually use more!!)
spices to taste - I usually use basil, oregano and rosemary

So you cook all that up similar to a bolognaise, and as it's reducing, you cook the:

Bechamel sauce:
melt 60g butter in a saucepan
stir in 4 tablespoons of plain flour
cook that for 1 min
then gradually add 2 cups of milk
then add 1/2 cup grated cheese
then add 1 tablespoon of grated parmesan.
salt, pepper and nutmeg to taste

Then I put lasagne noodles on the bottom of the lasagne dish.
Do a layer of meat
Then a layer of bechamel sauce
Then another layer of noodles
Then another layer of meat
Then another layer of noodles
Then the rest of the bechamel sauce on top, being sure to cover the noodles or I find they burn
Sprinkle the top with parmesan and cook at about 200 for 30 - 40 mins.

Then