You can use an equal amount of spinach or green cabbage for the bok choy.
Always read labels to make sure each recipe ingredient is gluten free. Products and ingredient sources can change.
To julienne means to cut food into long, thin matchlike strips. You can also cut the zucchini, carrots and onion into thin slices to save a little prep time.
Purchase preshredded carrots in the produce section of your supermarket.