To make the peanut sauce, in a food processor, combine the green onions, cilantro, jalapenos, garlic, and ginger and blend on high speed for 30 seconds, scraping down the sides of the bowl. Add the peanut butter and sesame oil and blend, scraping down the sides, for 30 seconds. Add the fish sauce and lime juice and process to blend. Add the coconut milk and hoisin sauce and process until smooth, scraping down the sides, as needed. You may add hot sauce to taste, if desired.