Wild Rice Soup

This is great for a cold winter day. It's super yummy and different from your typical soup.
1 (6 oz) pkg. Wild Rice (I think I used Uncle Ben's, which you can find next to the Rice-a-Roni's and things)
1 c. finely chopped onion
1 tsp. salt
1 tsp. dried chervil (which I didn't have, so I just left it out)
1 tsp. or more curry powder (I like curry, so I added more for a stronger flavor)
1/2 tsp. dried mustard
1/2 tsp. pepper
1/4 c. butter, melted
1 (8 oz) pkg. sliced fresh mushrooms (which I avoided since I don't like them. You can leave them out or put them in for the flavor, then take them out later. I like the flavor, just hate the sliminess)
1/2 c. thinly sliced celery
1/2 c. flour
6 c. chicken broth
2 c. half and half
Cook wild rice according to package directions. Meanwhile, cook onion and next 5 ingredients in butter in a large Dutch oven (or wok) over medium-high heat, stirring constantly, until onion is tender.
Add mushrooms and celery; cook, stirring constantly, until mushrooms are tender. Reduce heat to low. Add flour, stirring until blended. Cook 1 minute, stirring constantly.
Gradually add chicken broth; cook over medium heat, stirring constantly, until slightly thickened.
Stir in cooked rice, half-and-half and cook until thoroughly heated. Yield: 12 cups