We’re going to make a lovely onion & mustard tart dish! It’s the fourth Christmas episode and I love this one! It’s a gluten free buckwheat tart with caramelized onion, a mustard sauce, sweet & sour pearl onions, brioche and toasted & puffed mustard seeds. The gluten free buckwheat tart shell 125 g buckwheat flour 65 g cold cubes of butter 25 g beaten egg 3 g salt 15 g water Start by pouring the buckwheat flour on your worktop and make a well in the middle. Fill it with the c