Put your noodles in a large bowl, cover with boiling water and a plate. Let them soak for about 7-10 minutes.
Place the red onion in your mixer of choice. Add the red chile, cilantro, soy sauce, 1-2 tbsp olive oil, lime juice, sesame oil and fish sauce. Puree until smooth. Pour into a large bowl.
Drain your noodles, give a quick rinse with water, drain again then add to bowl with sauce. Stir well to combine flavours of sauce with noodles. Serve with Chicken Satay in Lettuce Leaf Wraps.