1.
Preheat the oven Th.6 (180°C).
2.
Melting butter in bain-marie.
3.
Add the onion and green pepper, cook over low heat. Add the flour and mix well.
4.
Gradually add milk, stirring constantly until thickened. Add salt and pepper.
5.
Add the chicken and broccoli.
6.
Pour everything into a greased baking dish. Sprinkle with grated cheese.
7.
Bake 30 mins.
Enjoy !