Instructions: 1. In a medium pot, heat the butter and oil over medium heat. Add the onion, celery and carrot; saute 5 minutes. Add 2 tablespoons broth and cook an additional 5 minutes.

2. Stir in the flour and cook 1 minute. (The mixture will be very thick.)

3. Add the remaining broth slowly, stirring to smooth out the flour. Bring to a boil. Reduce the heat and simmer 15 minutes, stirring often.

4. Remove the pan from the heat and stir in the half-and-half, grated cheese, Worcestershire, salt and pepper. Place back on low heat for 5 minutes until the cheese has melted. Hold on low heat.

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