In a large pot brown the lean ground beef over medium-high heat.Add the chopped onions, green pepper and minced garlic. Continue to cook over medium-high heat until the onions are translucent, approximately 5 minutes.Add the remaining ingredients, except for the uncooked macaroni noodles, and bring the mixture to a boil. Reduce the heat to low, cover and simmer for 20 minutes, stirring occasionally.Stir in the uncooked macaroni. Cover and simmer for approximately 25 additional minutes, or until the noodles are tender, stirring occasionally again. Remove the bay leaves and serve.