Roast Beef Sandwiches with Pesto Mayonnaise

• 1/4 cup mayonnaise
• 4 teaspoons pesto, homemade (see page 365) or store-bought
• 4 teaspoons grainy mustard
• Coarse salt and freshly ground pepper
• 4 onion rolls, halved
• 2 cups mixed baby greens
• 1 pound cooked roast beef (see page 182), room temperature, thinly sliced
• 8 thin slices red onion
• 8 cornichons (or gherkins), halved lengthwise

1. In a small bowl, mix together mayonnaise, pesto, and mustard; season with salt and pepper.
2. Layer each bottom roll half with pesto mayonnaise, greens, beef, onion, and cornichons, dividing evenly; top with other roll half.

mayonnaise, pesto, grainy mustard, salt, onion rolls, baby greens, beef, red onion, cornichons

Taken from www.epicurious.com/recipes/food/views/roast-beef-sandwiches-with-pesto-mayonnaise-387968 (may not work)