In a large skillet, brown the ground beef and onion over medium-high heat for 5 minutes, or until no longer pink. Remove the fat.

Combine the chili seasoning mix, canned tomatoes, and tomato sauce in a mixing bowl. Bring the water to a boil. Cover the pot and reduce the heat to low. Simmer for 10 minutes, stirring occasionally to avoid scorching the bottom.

Top with shredded cheese, sour cream, and chopped leeks, if desired, and serve in bowls. Serve and have fun!