Heat a large Dutch oven over medium-high heat. Add tofu and 3/4 teaspoon cumin; sauté 3 minutes. Stir in soy sauce; cook 1 minute or until liquid evaporates. Remove tofu mixture from pan.
Heat the oil in pan; add 3/4 teaspoon cumin, chopped onion, coriander, and oregano; sauté 4 minutes. Add tofu mixture, tomato paste, and next 5 ingredients (paste through garlic); stir well. Add water, beans, and tomatoes; bring to a boil. Cover, reduce heat, and simmer 30 minutes. Stir in vinegar. Spoon chili into bowls; top each serving with cilantro and sour cream.