Wash and chop your veggies. The onion can be chopped and then minced after they have been sauteed.
To sauté the onion, chop it and add to a skillet with the butter. Sauté on medium heat until the onions are caramelized. Be sure not to cook on high heat because you don’t want to burn the butter. Remove from the skillet and mince the hot onions until fine but not mushy. Set aside to cool.
In a small bowl add in the rest of the sauce ingredients and whisk until thoroughly combined. Add in the cooled onions and mix well. Taste and add the amount of salt and pepper you prefer.
To toast the sesame seeds add them to a dry skillet over medium low heat. Toss them around until they begin to become fragrant and take on a toasty color. Remove immediately and pour onto a cool plate. Do not leave them in the skillet because they will continue to toast and might burn and that won’t be good. This is totally optional. It is super yummy though!