Broccoli and tuna pie

INGREDIENTS
750 gr broccoli 
4 medium tomatoes 
1 can of tuna (360 gr)
grated cheese 

For sauce
600 ml milk
60 gr butter 
60 gr flour

METHOD
Wash broccoli, separate little flowers and cook for a few minutes until bright green. Drain well and place it on the bottom of baking pan. Arrange well drained tuna over broccoli and ​​tomatoes cut into rings over it. For the sauce melt the butter, add flour and stir. After a few minutes slowly pour the milk and cook over low heat until thickened. Pour this sauce over vegetables and tuna fish, sprinkle with grated cheese and bake in the oven for about 40 minutes at 180 degrees.