split pea soup with ham recipe

Ingredients: 1 tablespoon olive oil 1 large onion, finely chopped 3 cloves garlic, minced 2 carrots, peeled and diced 2 celery stalks, diced 1 pound dried split peas, rinsed and sorted 1 meaty ham bone (or 2 cups diced cooked ham) 8 cups chicken broth (or water) 1 bay leaf 1 teaspoon dried thyme