Slow cooker vegetable stew with cheddar dumplings

Name: Slow cooker vegetable stew with cheddar dumplings
Ingredients: 2 tbsp olive oil; 200g baby carrots scrubbed, trimmed and halved if large; 3 leeks cut into thick slices; 3 garlic cloves crushed; 3 tbsp plain flour; 400ml vegetable stock; 2 courgettes cut into large chunks; 2 x 400g cans butter or cannellini beans drained and rinsed; 1 bay leaf; 4 thyme rosemary or tarragon sprigs; 200ml crème fraîche; 1 tbsp wholegrain mustard; 200g broad beans or peas; 200g spinach; ½ small bunch of parsley finely chopped, plus extra to serve; 100g self-raising flour; 50g vegetarian suet or cold butter, grated; 100g mature cheddar; ½ small bunch of parsley finely chopped