Croissant Chicken Bake

I was served this at a brunch/bridal shower Daddy's family threw me. I've had this recipe in my inbox for nearly five years!

Simmer for 30 minutes:
4 chicken breasts
1 C. water
5 celery leaves
Set aside to cool

Mix sauce:
2 C. chopped celery
1 C. sour cream
½ can cream of chicken soup
1 C Mayo
2 T. lemon juice
1 C. sliced water chestnuts
½ C. sliced mushrooms
½ C. slivered almonds
2 T. onion

Topping:
1 C. shredded cheddar cheese
1 C. french fried onions

Chop chicken & mix with sauce, add topping.
Bake @350* for 40 min.
Serve in sliced croissants.

{LDM}