What's everyone's favourite shop bought dessert? I need to pick up something to take to a friend's on Friday night, think there will be three or four of us. Preferably something cold so host doesn't have to warm anything up, so profiteroles, cheesecake, panna cotta etc. I have M&S, Sainsbury's, Tesco, Iceland and Asda within 15 mins of me...any ideas please?