Tomato and Corn Chowder

Ingredients

• 3/4 pound baking potatoes, peeled, 1/2-inch dice
• 1 tablespoon unsalted butter
• 1 medium yellow onion, minced
• 3 cups chicken stock
• 6 medium ears of fresh corn, shucked, kernels removed
• 1/2 cup heavy cream
• 4 ripe medium-size red tomatoes, peeled, seeded, chopped, drained
• salt and freshly ground pepper
• 1 tablespoon finely snipped chives