Cut chicken in half with sharp knife.
In large bowl, place coconut milk and whisk in curry powder. Add lime juice, fish sauce, garlic, cilantro and sugar; mix well. Add chicken, turning to coat. Cover and refrigerate at least 4 hours or overnight.
On prepared grill (or in oven broiler), place chicken, skin side down. Cook about l0 minutes, turn and continue cooking until fork can be inserted in chicken with ease, about 30 minutes. Cool chicken slightly and cut into strips.
On 6 individual plates, arrange red lettuce leaves. Mix together shredded lettuce, bell pepper and mint; portion equally onto red lettuce. Place chicken strips on top. Sprinkle with peanuts and serve with Sweet and Sour Cilantro Dressing.