Smoky BBQ Chicken Pie - Pinch Of Nom

Ingredients

• 6 boneless, skinless chicken thigh fillets
• 2 medium onions (peeled and sliced)
• 2 cloves garlic (peeled and crushed)
• 1 x 400g tin cannellini beans ( drained)
• 1 x 400g tin chopped tomatoes
• 1 tbsp tomato puree
• 1 tbsp lemon juice
• 1 tbsp BBQ seasoning
• ¼ tsp smoked or ordinary paprika
• 1 tbsp balsamic vinegar
• 2 tbsp Worcestershire sauce
• 2 tbsp white wine vinegar
• 1 tbsp hot pepper sauce
• 1 tsp mustard powder
• 1 tsp sweetener (or caster sugar)
• low calorie cooking spray
• 800 g potatoes (peeled and cut into large chunks)
• 3 tbsp skimmed milk
• 20 g reduced fat Cheddar cheese (finely grated)
• salt and pepper (to taste)