In a large skillet over medium heat saute red onion in olive oil for 8 minutes, stirring frequently. Season with a pinch of sea salt.
While the onion is cooking prep the sweet potato noodles. Wash the sweet potatoes well and trim off the ends, keep the skins on. Using a spiralizer create spaghetti shaped noodles. Set aside.
After the onion has cooked for 8 minutes add the sweet potato noodles to the skillet, pour in 1/4 cup of water, stir well. Cover the pan and allow to steam cook for 5 minutes, stirring once during cooking. Remove from pan into a large bowl.
Combine all ingredients for dressing and set aside, pour over sweet potato noodles. Stir cilantro in and top with sliced jalapeno.