Savory Chicken Crepe Filling

I make this filling when I make crepes for dinner.  If you try it please let me know what you think because it is a Emily orginal!

Feeds 4 people

1/2 cups diced onion
1 cup chicken stock
1/4 cup Marsala cooking wine
1/3 cup ricotta cheese
1/4 cup fresh grated Parmesan cheese
3 tbsp butter
2 tbsp flour
2 tbsp cream
1 cup cooked diced chicken

Heat butter in pan.  Add onion and cook until golden.  Add flour to pan and cook until fragrant, 1-2 minutes.  Add stock and Marsala and cook until thickened.  Add in cheeses and stir until melted.  Add chicken and heat through.  Add cream at the end until desired thickness.  Salt and pepper to taste.  Fill crepes at table.