Potato & Savoy cabbage soup with bacon

Name: Potato & Savoy cabbage soup with bacon
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: British
Ingredients: 1 onion; 1 carrot; 1 celery stick; 2 garlic cloves; 1 tbsp olive oil, plus extra to serve; 550g floury potatoes, peeled and cut into small cubes; 1l chicken or vegetable stock; 8 rashers streaky bacon; a quarter medium Savoy cabbage (about 200g/8oz)