M&S Minced Beef & Onion Shortcrust Pastry Pie Butter enriched shortcrust pastry pie filled with tender British beef and onion in a rich and meaty gravy. Serve with rosti cakes and sugar snap peas. Oven cooks in 25 minutes. Serves 1. 100% of M&S Select Farms products meet our high quality and environmental protection standards. We know and trust all our Select Farmers, so you can trust M&S for your fresh food.