The most fool-proof recipe for clam chowder that I have ever come across.

Butter - 2Tbsp./ 30 ml.
Onion, diced - ½ cup/125 ml.
Water, hot - 1 cup/250 ml.
Potato, raw, diced - 1 cup/250 ml.
Celery, diced - ½ cup/125 ml.
Clams and juice - 10 oz./284 ml.
Milk - 2 cup/500 ml.
Pepper - ½ tsp./2 ml.
Salt - 1 tsp./5 ml.

Method
In saucepan, melt butter. Saute onion and celery. Add water, and diced potato. Cook until potato is tender.

Add clams and juice, milk, salt and pepper. Simmer over low heat for 20-25 minutes.
Serves 4.