CHICKEN WITH BORLOTTI BEANS & CAVOLO NERO

• 1 tbsp olive oil • 8 British chicken thighs, trimmed of excess fat • 200g pack Waitrose & Partners Cavolo Nero • 1 onion, sliced • 2 garlic cloves, sliced • 2 rosemary sprigs • 200ml dry white wine • 250ml Cooks’ Ingredients Chicken Stock • 2 x 400g cans borlotti beans, drained and rinsed • 2 tbsp crème fraîche