“When Jesus told his followers to have “faith the size of a mustard seed” he was partly thinking ahead to the career of LA hitmaker Dijon Isaiah McFarlane, whose 2014 debut album predicted 10 Summers of chart domination. But rare is the rap producer who can stay hot for more than a few seasons. For two years Mustard’s signature sound – a minimal concoction of 808 handclaps, booming bass and Dorito-”