put the oil in a pot over medium heat. when it's hot

add the beef, onion, and pepper. cook and stir until meat

has lost its pink color and onion is soft; drain off fat.

stir in garlic, chili powder, cumin, and oregano and cook

for 1 minute more. add the beans and tomates. bring to

bring to boiling; reduce heat and cook, covered

stirring occasionally, until tomatoes have begun to break

down. 15 minutes.