Ingredients

1 1/2 tablespoons olive oil

2 8- to 10-ounce red onions, cut into 1/3-inch-thick rounds

3 1/2 tablespoons red wine vinegar

6 cups trimmed large arugula leaves (about 4 ounces), divided

3/4 cup mayonnaise

8 1/3-inch-thick slices seeded wheat bread (such as La Brea Bakery) or four ciabatta rolls, cut horizontally in half

12 ounces thinly sliced smoked turkey

3/4 cup coarsely crumbled blue cheese (such as Maytag; about 3 ounces)

Description

To Take The Sandwiches On A Picnic, Use Ciabatta Rolls—they Will Stay Firm Despite The Mayo.

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