Potato Soup
["1 large onion, chopped", "1/2 c. fresh mushrooms, sliced", "1 Tbsp. olive oil", "3 large potatoes, peeled and sliced (about 4 c.)", "1 large can beef broth (14 1/2 oz.)", "1 large can chicken broth (14 1/2 oz.)", "1/2 c. buttermilk", "1 Tbsp. cornstarch", "1 Tbsp. fresh basil, chopped or 1 tsp. dried", "1/4 c. Canadian bacon, chopped (about 2 slices)", "1/4 c. plain low-fat yogurt (optional)"]
["In deep saucepan, cook onion and mushrooms in hot oil until tender and lightly browned.", "Add potatoes, beef and chicken broth; bring to a boil, reduce heat and cover.", "Simmer 35 to 45 minutes until potatoes are tender."]
["onion", "fresh mushrooms", "olive oil", "potatoes", "beef broth", "chicken broth", "buttermilk", "cornstarch", "fresh basil", "Canadian bacon", "yogurt"]