Chicken Breast Sandwiches with Caramelized Onions, Watercress, and Paprika Aïoli

EPICURIOUS
12Ingredients
70Minutes

Ingredients

US|METRIC
  • 1/2 cup mayonnaise
  • 1 tablespoon fresh lime juice
  • 1 teaspoon spanish paprika (hot smoked)
  • 1 garlic clove (pressed)
  • 2 tablespoons extra-virgin olive oil (plus more for brushing on rolls)
  • 2 tablespoons vegetable oil
  • 2 pounds onions (halved lengthwise, thinly sliced crosswise, about 7 cups)
  • 3 skinless boneless chicken breast halves (8-ounce, cut crosswise in half)
  • 6 sourdough sandwich rolls (or twelve)
  • 1/2 inch sourdough bread (thick slices)
  • 3 cups watercress (lightly packed, or arugula)
  • pimentón (or * Sometimes labeled Pimentín Picante, de La Vera Picante; available at specialty foods stores and from tienda.com.)
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