Combine all the ingredients (except for the water) for the sauce into a medium bowl.
Heat 1-2 tablespoons oil in a large skillet on medium-high heat until pan starts to get smoky. Add beef and allow to sear and brown on both sides (about 1 minute). Transfer onto a plate.
*Be careful not to overcook zucchini noodles - leave them in the pan no more than 1-2 minutes as they continue to soften once they cook.