Fish Chowder Soup

Name: Fish Chowder Soup
Ingredients: 1 1/2+ lbs. Kosher halibut, cut in to medium chunks. (Cod can be substituted or other white fish from your kosher fish monger); 2 medium sweet onion, diced; 2 tbsp. margarine; 1/2 tsp. Kosher salt (to taste); 1/4 tsp. black pepper (to taste); 2 cups water; 2 medium potatoes, peeled and cut into cubes; 2 1/2 cups Whole milk; 1/2 cup light cream (add more to reach the consistency you desire); 1 1/2 cups frozen corn (or any other frozen vegetable); chives (for garnish)