Chicken Corn Chowder Topped With Avocado And Tomato

Name: Chicken Corn Chowder Topped With Avocado And Tomato
Ingredients: 2 Tablespoons extra virgin olive oil; 1 medium onion, finely chopped; 3 large carrots, peeled and chopped; 3 stalks of celery, diced; 4 cloves fresh garlic, minced; 3 14 oz cans chicken broth; 2 lb bag frozen corn or 8 fresh ears of corn, kernels cut off; 2 large boneless skinless chicken breasts, cooked and shredded; ½ Cup heavy cream; 8 oz sour cream; Salt and pepper to taste; 1 avocado, diced; 1 tomato, seeded and diced; Fresh ground black pepper