Heat butter in a saucepan over low heat.

Add flour, stir and cook on very slow heat for about 2-3 minutes. Do not brown.

Switch off heat and let the flour cool a bit, add milk and stir well.

Switch on heat again and cook over low heat, keep stirring constantly.

When sauce begins to thicken add salt and pepper and remove from heat.

Mix Broccoli, cooked pasta, Chicken pieces and add ollive oil along with salt and black pepper to taste. Toss well and place in a baking dish.

Pour white sauce over broccoli and chicken and finish with sprinkle of grated cheese.

Pre heat oven and place baking dish inside oven, bake for 20-22 minutes at 210 C.