Creamy Cheesy Vegetable Soup

Cook til tender:
2 cups cubed potatoes
1 cup diced carrots
1/2 cup chopped Celery
1/4 cup minced onion
2 cups water
1/2 tsp salt

Do Not drain.

Add 5 oz pkg of frozen broccoli and cauliflower the last 5 - 10 minutes.
Make a pasts of 1/4 cup butter, 1/4 cup flour, 1/2 Tbs dry mustard.  Stir in
1 3/4 cup milk and cook til thick.  Add vegetables.  Heat through to boil.  Add 1/2 lb.
Velveeta Cheese