Cheezy chicken, green bean and mushroom casserole

If you like chheese+chicken+mushrooms+green beans then try this somewhat involved recipe. You will first have to make chicken veloute see my recipe for that" LINK TO RECIPE----LINK TO RECIPE---------------http://youtu.be/F7Kc7MWWRGA"

1 qt. chicken veloute mixed with 2 c. shredded cheddar cheese,
4 oz. onion, 2&3/4 lb. chicken legs or thighs,
1/2 c. dry white wine,
1/2 c. fresh parsley,
6 oz. mushrooms,
1/2 lb. green beans,
3 ea. garlic cloves,
3/4 c. panco crumbs,
1&1/2 oz..butter,
2 c. cheddar chee