500g/1lb 2oz Swiss chard
1 lemon, juice only
12 banana shallots, peeled
sprig thyme
60驳/2录辞锄 anchovies, chopped
2 tbsp capers
freshly ground black pepper
sea salt
250ml/9fl oz beef or veal stock
50ml/2fl oz vegetable oil
115g/4oz butter
2 x 680g/1lb 8oz T-bone steaks, thickly cut