in a large stockpots over medium heat saute onions in oil until translucent about 10 minutes.

add butter. stir in flour salt and pepper and cook 3min

add chicken stock and potato and broccoli bring to boil and simmer uncovered. 15 min until. potato are tender. add corn and cook 10 min.

add half & half and cheese

cook 5 min more until cheese is melted

season to taste with salt and pepper.

serve hot.