Go to calle San Lorenzo. Plenty tapas bars there. There's also a really good one just on the right as you walk through the gate in front of the cathedral.
Great town Burgos.
NH Palacio de Burgos. Very nice place with underground parking just 3 mins from cathedral.
I had 2-3 tapas small plates out, and a couple of bottles of beer so I reckon it was that. The only thing I had that Mrs Berin didn’t have was a mini-pork burger. Which was very tasty, I must say.