Mango-Pecan Chicken

INGREDIENTS

• 1 tablespoon vegetable oil
• 1 onion, halved and sliced
• 2 mangos - peeled, seeded, and cubed
• 2 tablespoons lemon juice
• 1 tablespoon white sugar
• 1/4 teaspoon ground ginger
• 1/8 teaspoon ground cinnamon
• 1/8 teaspoon ground mace
• 4 skinless, boneless chicken breast halves - cut in half lengthwise
• salt and pepper to taste
• 1/4 cup chopped pecans