Ingredients:
- 1 tablespoon olive oil
- 1 small onion, finely chopped
- 1/2 red bell pepper, stemmed, seeded and finely chopped
- 1 cup frozen corn
- 2 pounds ground beef (90 percent lean)
- 1 cup dry bread crumbs
- 1 large egg
- 1 cup plain yogurt (not nonfat)
- 1/2 cup finely chopped fresh cilantro
- 1 tablespoon chili powder
- 1 teaspoon cumin
- 1 1/2 teaspoons salt
- 1/2 teaspoon pepper
- 3 tablespoons ketchup, optional
