Cook the noodles in a large pot according to package directions until al dente. Drain the water, rinse in cold water and add to a large bowl.
Stir in the dressing.
Cut the cucumbers into slices and the tomatoes in half if they're large. Add the veggies to the bowl and toss to combine.
Cover and chill for 1 hour or until ready to serve.
Notes
Storage: Store in an airtight container in the refrigerator for up to 3-4 days, stirring and adding a little extra slaw dressing before serving if needed.