Meanwhile, in a large saucepan, heat butter over medium-high
heat. Add onion, celery and carrot; cook and stir 6-8 minutes or
until tender. Add garlic; cook 1 minute longer. Stir in flour until
blended; gradually whisk in milk and broth. Bring to a boil, stirring
constantly; cook and stir 12 minutes or until slightly thickened.
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