Brown ground beef in large skillet over medium-high heat until thoroughly cooked, stirring frequently. Drain.

Add seasoning mix, water, uncooked macaroni, corn, beans and tomato; mix well. Bring to a boil. Stir; reduce heat to medium-low. Cover; cook 8 to 10 minutes or until macaroni is of desired doneness, stirring occasionally.

Serve in bowls with generous dollops of sour cream and a sprinkling of cheese and chives. Serves 5.