Clam Chowder

1 cup chopped onion
3 cups diced potatoes
1 bottle (8 ounces) clam juice
1 teaspoon salt
1/4 teaspoon pepper
2 cans (approximately 7 ounces each) minced clams
3 tablespoons flour
2 cups half-and-half
1 cup milk

Preparation:
Sauté onion in some butter until softened. Add potatoes and clam juice, salt, and pepper. Cover and simmer for about 15 minutes, or until potatoes are tender. Remove from heat. Add minced clams with their liquid. Whisk flour into milk; add to chowder with half-and-half. Cook over medium heat, stirring constantly, until clam chowder thickens and bubbles, or about 3 minutes.