Smoked Salmon Chowder

I made this last week & forgot to post, so hopefully I can remember what I did.

1T butter
1T flour
**I sort of made a roux, but I'm not sure I really needed this part. I figured since I was using butter, I might as well add a little flour. There was so little added, I'm not sure it made a difference.
1 each chopped onion
1 cup chopped carrots
1 cup chopped celery
1 small head brocoli chopped, stems included
2 russet potatoes, peeled and diced
1/2 can whole kernel corn
6 oz smoked salmon
2 cups cream
water as needed
salt & pepper
nice vinegar of choice; I used banyuls; approximately 1/4 cup

*sweat onions, carrots, & celery in butter until onions are translucent (I like to season with some salt and pepper at this time)
*add flour, and cook for approx. 1 minute
*brocoli and potatoes, and just enough water to cover
*bring to a boil
*add corn, salmon, cream, and allow to cook until potatoes are tender and soup is thick and creamy. Adjust seasoning, and finish with vinegar to round out the flavor but not make it tart. You shouldn't even really notice the flavor of the vinegar.