*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Combine tomatoes, onion, water, mustard seed, mustard powder, garlic, bay leaf, and black pepper in a large, heavy pot over medium heat; bring to a simmer and cook for 10 minutes. Stir soy sauce through the tomato mixture; continue cooking another 5 minutes. Season with salt. Remove bay leaf to serve.