Roast Beef Sandwiches with Sweet and Sour Red Onions and Blue Cheese

By 12_34

Ingredients

• 2 c. thinly sliced red onions
• 2 TBSP. red wine vinegar
• 1 tsp. sugar
• 4 large soft whole grain rolls, toasted
• 1/2 c. crumbled blue cheese
• 12 tomato slices
• 8 oz. thinly sliced roast beef
• 2 c. (packed) small watercress sprigs

Details

Servings 4

Preparation

Step 1

Combine onions, vinegar, and sugar in medium bowl; sprinkle with salt and pepper. Let stand until onions are soft, tossing occasionally, at least 1 hour and up to 4 hours.

Place bottom halves of rolls on work surface. Sprinkle with cheese. Top each with 3 tomato slices, then 1/4 of roast beef. Top each with 1/2 c. watercress, then 1/4 of pickled onions. Cover with tops of rolls. Cut each sandwich in half.