Victoria Moore's wines of the week: the best supermarket wines Marananga Dam Grenache Shiraz Mourvèdre 2009 Barossa Valley, Australia (14.5%, M&S, £13.99) Reeks of Barossa, with faint liquorice, dust and a vast, dark, rich cauldron of juice behind it. Made at Torbreck, using the intensely flavoured grapes from 50-year-old vines; the name comes from the subregion in which the winery is located. I love the powdery texture that the grenache brings to this. Full-blooded and amazing value.