Toss together the cabbage, carrots, onion, bell peppers and jalapeno peppers in a large bowl. Whisk together the vinegar, mustard, and sugar in a medium bowl; season with salt and pepper. Slowly whisk in the oil. Pour the dressing over the vegetables and toss to coat. Season with salt and pepper. Let sit 15 minutes at room temperature before serving.
Recipe courtesy of Bobby Flay