Whisk together the coconut milk, curry powder, tomato paste, chile flakes, ginger, garlic, 1 teaspoon salt and several grinds black pepper in a large microwave-safe bowl. Add the peas and cauliflower and toss to coat. Cover the bowl with plastic wrap and microwave until the cauliflower is crisp-tender, about 4 minutes. Uncover and let cool to room temperature.
Transfer the vegetables with the marinade to a large resealable plastic bag and add the chicken. Squeeze out most of the air and seal, then toss gently to coat the chicken with the marinade. Freeze until ready to use. Thaw in the refrigerator for at least 24 hours before cooking.
Pour the chicken, vegetables and marinade into a large skillet and heat over high heat. Cook. stirring often, until the chicken is cooked through, about 12 minutes. Season with salt and pepper.
Divide the chicken and vegetables among 4 plates. Serve each with naan and garnish with cilantro leaves and yogurt.
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