Chicken thighs with red onion, apple and chestnuts recipe

Ingredients

• 2 tbsp olive oil
• 400 g bone-in chicken thighs (2 or 3 pieces)
• 0.5 red onion, thinly sliced
• 0.5 red apple, thinly sliced
• 30 g cooked chestnuts, roughly chopped (or use unsalted walnuts or hazelnuts)
• 100 g savoy cabbage, finely chopped
• 10 g fresh sage leaves, roughly chopped