Chicken Squash and Watercress Gratin

Ingredients

• 1 (600g) butternut squash, washed
• 450g/ 1lb baby new potatoes
• 2 small red onions, sliced
• 1 red pepper, deseeded and chopped
• 4 chicken breast fillets, diced
• 2 tbsp olive oil
• 1 (200ml) carton creme fraiche
• 1 x 85g bag watercress, roughly chopped
• 1 clove garlic, crushed
• 75g/ 3oz gruyere cheese, grated
• salt and freshly ground black pepper

Method