Cheesy ham & broccoli soup

1 lg. onion
1 T. oil
3 c. milk
3/4 lb. (12 oz) Velveeta cheese-cut in 1/2 inch cubes
3 c. frozen broccoli cuts, thawed
6 oz. ham-chopped into 1/2 inch chunks
1 c. frozen corn-thawed

COOK onions in hot oil in large saucepan on medium heat 5 to 7 min. or until tender. Stir in milk. Bring to simmer, stirring frequently.

ADD VELVEETA and broccoli; cook and stir 6 to 8 min. or until VELVEETA is melted and broccoli is heated through.

STIR in ham and corn; cook 4 to 5 min. or until heated through, stirring occasionally.