Mussels and broad bean tartine sandwich
By Michel Roux Jr. From Saturday Kitchen Ingredients 500g/1lb2oz live mussels, scrubbed and debearded 2 thyme sprigs 1 bay leaf 100ml/3½fl oz dry white wine 1 red onion, thinly sliced 4 tbsp red wine vinegar 125g/4½oz jar or tin cooked broad beans 5 tbsp olive oil …