2 teaspoons extra-virgin olive oil
1 1⁄2 pounds boneless, skinless chicken breasts
2 tablespoons fresh lemon juice
12 ounces snow peas, trimmed and cut into 1⁄2" pieces
1⁄2 cup nonfat or low-fat plain yogurt
1⁄4 cup mayonnaise
1 tablespoon curry powder
2 teaspoons Dijon mustard
1 teaspoon finely grated lemon zest
1⁄4 teaspoon salt
2 celery stalks, finely chopped
1 small bunch scallions, chopped
Freshly ground black pepper
1⁄3 cup unsalted roasted peanuts, chopped