Baked crab with cheesy crumb topping
By Matt Tebbutt From Saturday Kitchen Ingredients 1 tbsp olive oil 1 shallot, diced 1 garlic clove, finely chopped 2 small celery sticks, diced 1 leek, diced 2 fresh tomatoes, peeled and diced 100ml/3½fl oz shellfish or fish stock 150ml/5fl oz passata 25ml/1fl oz dry sherry 25ml/1fl …