Herby griddled lamb steaks with charred salsa verde new potatoes recipe

Halve any larger potatoes, then cook all the potatoes in a pan of boiling salted water for 15 mins, or until tender. Zest and juice the lemon half into a large bowl. Peel and finely chop the garlic, then chop the rosemary and add both to the lemon. Add the oil and season. Toss the lamb steaks in the dressing to coat.