Tilapia Corn Chowder

Name: Tilapia Corn Chowder
Ingredients: 2 ounces bacon (about 2 slices); 1 teaspoon canola oil; 1 stalk celery, diced; 1 leek, white part only, halved lengthwise, rinsed and thinly sliced; 1⁄2 teaspoon salt; 1⁄2 teaspoon fresh ground black pepper; 1 pinch crushed red pepper flakes (optional); 4 cups reduced-sodium chicken broth; 8 ounces yukon gold potatoes, diced; 2 cups fresh corn kernels (about 4 ears); 1 1⁄2 lbs tilapia fillets, cut into bite-size pieces; 1 teaspoon finely chopped fresh thyme; 1 cup half-and-half; 2 teaspoons lemon juice; 2 tablespoons chopped fresh chives (optional)