Little bits of loveliness from Sauchiehall Street to the Silk Road, from a chef who wants to deliver maximum joySebb’s is a basement restaurant on Miller Street in Glasgow with a door that’s perilously easy to miss, even though it’s bright red. The first time I tried to find it, I waltzed past and almost ended up in the pants department of TK Maxx. I was luckier the second time around, and soon found myself descending a set of stairs into a room with the distinct vibe of a beatnik diner inside a bowling alley: there’s no natural light, there are booths that are perfect for conspiring in, a DJ…