Combine the full-fat coconut milk, mango juice, minced ginger, green curry paste, and a pinch of sea salt in your slow cooker. Stir well until thoroughly mixed.
Place the boneless chicken breasts or thighs into the slow cooker, ensuring they are submerged in the coconut milk mixture.
Add the sliced carrots, broccoli florets, and cubed red bell peppers on top of the chicken.
Cover and cook on low for 6-8 hours or on high for 3-4 hours until the chicken is tender.
Remove chicken from slow cooker and shred with forks. Mix tapioca starch with a few tablespoons of curry sauce until smooth, then stir back into the slow cooker along with the shredded chicken to thicken the sauce.
Stir in the cubed fresh mango just before serving to keep its flavor vibrant.
Ladle curry into bowls and garnish with sliced green onions, fresh cilantro, and unsweetened coconut flakes. Serve over cauliflower rice or your favorite grain.