Fry diced onion in vegetable oil for about 3 minute.
Stir in soy crumbles and continue to stir onion and crumbles together for about 3 more minutes.
Pour onion mixture, beans, tomatoes, and tomato sauce into large saucepan. Season with salt, pepper, sugar. The seasoning is really up to personal taste. Personally, I use a Gold Star Chili seasoning mix that my mom sends down from Cincinnati and add just a bit of sugar and pepper. Sugar may sound weird in chili, but Cincinnati chili often uses chocolate and cinnamon too.
Cook chili on high until a light boil forms, stirring occasionally. Once chili boils, turn to low-medium heat and let cook for another 30 minutes or until the chili reaches a good consistency for your taste.