Whisk together the vinegar and mustard in a small bowl. Slowly whisk in the olive oil and season with salt and pepper to taste.
Toss the watercress in a few tablespoons of the dressing and arrange on a platter. Top with slices of the tomatoes and onions and drizzle with the remaining dressing. Sprinkle with the blue cheese.
Tools You May Need
Copyright 1999 Bobby Flay. All Rights Reserved.
Tools You May Need
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