celebration cheddar soup

Ingredients

• 3 tablespoons butter, unsalted
• 3 cups carrots, grated
• 3 - celery stalks, chopped
• 3 - green onions, chopped white and green parts
• 2 14.5 ounces cans low sodium chicken broth
• 2 10 3/4 ounces cans cream of potatoe soup
• 1 cup milk
• 1 cup sour cream
• 1 pound processed cheese food such as kraft's old english cheese