Heat oil in a large skillet over medium-high heat. Add peppers and onions and cook until slightly tender. Add the ground beef and spices and cook until browned. Skim off excess grease. Add the diced tomatoes and soy black beans and simmer for about 10 minutes, stirring occasionally.
To serve, garnish chili with cilantro. If desired, top with shredded Cheddar or Jack cheese, sour cream, and sliced scallion tops.