1/2 cup diced onions
1/2 cup diced green pepper
2 1/2 teaspoons minced fresh jalapeno pepper
1 teaspoon minced garlic
2 tablespoons vegetable oil 
1 lb ground lean beef, medium grind
1/4 teaspoon salt
1/2 teaspoon freshly ground black pepper
1 teaspoon cumin
1/2 cup ketchup
1-1/2 cups diced fresh or canned tomatoes
6 to 8 Sandwich or Burger Buns, lightly toasted

• Sauté the onions, green pepper, jalapeno pepper, and garlic in oil until the onions are translucent. 
• Add the beef and cook, stirring, until the meat is lightly browned. 
• Drain off all the fat, add the salt, pepper, and cumin, and cook for about 1 minute more, stirring all the time to season evenly. 
• Add the ketchup and tomatoes and cook, uncovered, over low heat until reduced to a thick sauce. 
• Serve on toasted buns.