Add in tomatoes and simmer for 30 mins fairly brisky , final mix should be relatively thick and not too runny
step 6
Season to taste
step 7
Next make the bechamel sauce - melt butter in pan , when sizzling add flour and mix thoroughly. Fry for a few minutes to cook out flour but keep and eye on it and stir occasionally so doesn't burn.
step 8
Gradually add in milk whilst stirring - sauce needs to be somewhere in between double cream and thick cream. Need quite a lot of sauce.
step 9
Leave to cool slightly and add in cheese and stir until melted
step 10
Next make up Lasagna start with sheet of lasagna , them ragu sauce then cheese sauce and repeat. Finish with layer of lasagna sheets and top with cheese sauce and then grate over Parmesan. Cook for 30 to 35 mins at 180.