Mango Chicken with Greens

INGREDIENTS

• 1 teaspoon ground cumin
• 1/2 teaspoon curry powder
• 1 tablespoon distilled white vinegar
• 1 tablespoon balsamic vinegar
• 1 tablespoon olive oil
• 1/4 cup brown sugar
• 1 pinch salt and ground black pepper, or to taste
• 4 chicken drumsticks
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• 2 tablespoons butter
• 1 large mango, peeled, seeded, and sliced - divided
• 1 tablespoon Dijon mustard
• 1 clove garlic, crushed
• 1 teaspoon crushed red pepper flakes
• 2 small onions, sliced - divided
• 1/4 cup white sugar
• 1 bunch mustard greens, washed and chopped
• 1/4 cup raisins