To make vinaigrette: In large bowl, mix oil, fish sauce, rice wine vinegar, water, sugar, cilantro, lime juice, garlic and chile. Toss cabbage and carrots in vinaigrette; refrigerate until ready to serve.
To make skirt steak: Marinate steak in coconut milk, garlic, lime juice, cilantro, sriracha and salt, to taste, at least 1 hour, or up to 24 hours.
Heat grill to high.
Grill 3-4 minutes each side until medium rare.
Let rest 3 minutes.
Thinly slice steaks against grain and serve with vinaigrette, rice and crushed peanuts; garnish with lime wedges.