Cheese Chowder

I am not sure if I put this in the Dale Girl Cookbook.  If I didn't, I should have. Add it immediately!  This is so delicious!

4 c potatoes, peeled and cubed, (4 medium)
2 c diced carrots
2 c chopped celery
1 1/2 c minced onion
4 c water
2 t salt
1 10 oz frozen broccoli
3 T chicken base (or bouillon cubes use like 6)
3 1/2 c milk
1/2 c butter
1/2 c flour
1 T dry mustard

Prepare potatoes, carrots, celery and onion.  Add to large pot with salt and water.  (make sure water just covers veggies)  Cook til not quite done, then add broccoli and chicken base.  Don't drain water.  Meanwhile, in saucepan melt butter.  Add flour and mustard.  Cook til paste forms, 1-2 minutes.  Add milk and cheese.  Do not boil.  Stir constantly til cheese it melted.  Add to pot of veggies.  Stir together.  Do not boil.