Potato, Broccoli, Corn Chowder

I made some really tasty soup.  I boiled 5 potatoes, chopped in cubes.  I sauteed onions & garlic and made a white sauce (flour, vegetable stock, milk, salt & pepper), adding 1/2 cup sour cream, 1 Tbsp. Worcestershire sauce, 1 tsp. chili powder, 1 Tbsp. tomato paste, a sprinkle of hot sauce and some cayenne pepper.  After that thickens, add 1 1/2 cups grated cheddar cheese, 1/2 c. parmesan cheese, the boiled potatoes, about 2 cups of chopped broccoli (I used frozen that I cooked in the potato water) and 1 cup of frozen corn.  Add more milk or vegetable stock if it's too thick.  We liked it!