Ham and Cheese Puffs

100g plain flour
400ml milk
3/4 cup grated gruyere cheese
1tbls ovlive oil
1small onion - finely chopped
50g ham - finely chopped
2 eggs - beaten
fine breadcrumbs for coating
150mls olive oil for frying

Melt butter in pan
Add flour and cook for 3-4 mins stirring constantly
Remove from heat and add the milk
Stir to avoid lumps and return to the heat. 
Bring to boil, reduce heat and cook for a fruther 5 mins, stirring continuously,  the mixture should be thick
Remove from heat and set aside - stir in cheese
Heat tbls of oil, add onion and fry until soft.  Add the ham and cook for 3-4 mins then fold into white sauce
Pour into a lightly oiled tray about 2 cm thick and refridgerate for 2 hours
When cool use a tablespoon to scoop out the mixture and roll it in your hand to form an egg shape. 
Dip into beaten egg and toss in breadcrumbs
Heat ooil in pan until hot and fry until crisp and golden
Drain on kitchen paper and serve hot.