Instructions: 1. Melt butter in a 1-quart glass measuring pitcher in microwave oven

(about 30 seconds at High). Add flour and blend to a smooth paste. Add milk gradually, stirring constantly.

2. Cook uncovered in microwave overn 4 minutes at High, or until thickened; stir vigorously after 2 minutes, then every 30 seconds.

3. Add salt, dry mustard and cheese to sauce; stir well. Cook uncovered in microwave oven 1 minute at High; stir.

Yield: About 1 cup.

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