Blend green garlic, vinegar, chiles, mayonnaise, salt, pepper and oil in a blender until emulsified. Place cabbage and red onions in a bowl, add the dressing and stir until combined. Fold in the cilantro and season with salt and pepper to taste. Let it sit for at least an hour before serving.

If it is too spicy (some peppers are hotter than others) add a little honey.