Creamy Vegetable Soup

I found this recipe online and added to it. I wanted to eat a creamy soup with corn and broccoli. I absolutely love this soup!!!!

Yield 8-10 servings

Ingredients:
3 tablespoons margarine/butter
1 onion, finely diced
3 potatoes, peeled and diced-OR 3-4 cupsfrozen diced potatoes
3/4 cup chopped/shredded celery
2 cups sliced/shredded carrots
3 cups of finely chopped broccoli
2 teaspoons salt
1/8 teaspoon ground black pepper
4 cups chicken broth or water
3 cups milk
1/2 teaspoon dried parsley
1/4 cup cold water
1/4 cup cornstarch
sour cream
shredded cheddar cheese

Directions:
Melt butter in large saucepan over medium heat. Add onion and cook until tender.
Add carrots, broccoli and celery and cook for 10 minutes or until carrots become a little tender. Add water or broth, potatoes, salt, and pepper. Bring to a boil and allow to simmer for 15 to 20 minutes or until all vegetables are tender.
Add milk and parsley and heat just to boiling.
In a separate bowl stir cornstarch into cold water. When completely dissolved add to hot soup, stir and serve.

Optional:
Top with Sour Cream and Cheese