Step 1

In a Dutch oven or soup kettle, combine the first 5 ingredients; bring to a boil. Reduce heat; cover and simmer for 20 minutes or until vegetables are very tender. With a potato masher, mash vegetables several times. Add Canadian bacon; continue to simmer.

Step 2

Meanwhile, melt butter in a small saucepan; stir in the flour and cook, stirring constantly, for 1 minute. Gradually whisk in milk. Bring to a boil; boil and stir for 2 minutes (mixture will be thick). Add vegetable mixture, stirring constantly. Remove from the heat; add cheese and pepper. Stir just until cheese is melted.