Sunday night minestrone

Name: Sunday night minestrone
Ingredients: 1 large ham hock; 1 onion, sliced; 1 carrot, peeled and sliced; 1 celery stick, sliced; Fresh herbs; 2 tbsp olive oil; 1 leek, sliced; 1 red onion, sliced; 2 carrots, peeled and sliced; 2 celery stalks, sliced; 2 medium potatoes, peeled and diced; 1.5 litres homemade ham stock; 400g tin diced tomatoes; 400g tin cannellini beans, drained and rinsed; 75g tubetti pasta, cooked al dente; 1-2 cups shredded ham from the hock; Fresh basil pesto to serve