Add all ingredients except the noodles.
Stir together and add the noodles. If using pad thai noodles, you might need to cook them a bit longer. Using the microwave for about a minute helps. Other thinner rice noodles usually cook very quickly in the hot broth, but nuking in the microwave might be necessary.
For the single serving, you can add veggies. However, it will take longer to cook.
For the large version, I used chicken thighs that I already cooked. However, if you start raw, you will need to season with salt and pepper, then increase your cooking time until the chicken are cooked thoroughly.
Also, for the larger version, I put all the ingredients into a slow cooker set to high for a few hours. The longer it cooks, the better the flavors permeate.
This freezes beautifully! I had some after 6 months and it still tasted wonderful.