This is from the Betty Crocker Sunday Dinner Cookbook, but with a few modifications (like adding the corn).
1 can (14.5 oz) chicken broth (can use a couple bouillon cubes in water or if you leave it out, it's probably ok)
3 med potatoes, cut into large pieces (about a pound)
1 1/2 C milk
1/4 t salt
1/8 t pepper
2 med green onions (optional)
1 can of corn (or half a bag or so of frozen corn)
1 - 1 1/2 C shredded cheddar
Boil the potatoes in the broth for about 15 minutes until tender. Remove the saucepan from the heat, but DO NOT drain. Break the potatoes into smaller pieces with a potato masher or fork. The mixture should be lumpy. Add the milk, salt, pepper, green onions, and corn. Heat through on medium, stirring occasionally. Don't let it boil or it will look curdly. Add the cheese.