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.
I used whole peeled canned tomatoes in place of the raw Roma. And, for the onions, I stewed them in the juice separately until almost transparent, before adding in the sliced tomatoes. This me...
This one was hard for me to rate. I thought it was ok tasting, but I feel that it was too much work (peeling, seeding the tomatoes) for just an ok result, IMO. I do think that I prefer Italian-...