Healthy vegetable soup

Name: Healthy vegetable soup
Ingredients: 200g sourdough bread cut into croutons; 1 tbsp caraway seeds; 3 tbsp olive oil; 1 garlic clove chopped; 1 carrot chopped; 1 potato chopped; 600ml vegetable stock (we use bouillon); 100g cherry tomatoes halved; 400g can chopped tomatoes; pinch of golden caster sugar; 1 bouquet garni (2 bay leaves, 1 rosemary sprig and 2 thyme sprigs tied together with string); 1 celery stick chopped; 200g cauliflower cut into florets; 150g white cabbage shredded; 1 tsp Worcestershire sauce; 2 tsp mushroom ketchup