Butternut Squash Lasagne - Pinch Of Nom

Ingredients

• 400 g extra lean minced beef
• 1 medium butternut squash
• 1 carrot (peeled and chopped)
• 1 stick celery (chopped)
• 1 onion (peeled and diced)
• 4 large mushrooms (sliced)
• 1 medium courgette (diced)
• 1 aubergine
• 1 red pepper (deseeded and diced)
• 1 green pepper (deseeded and diced)
• 4 tbsp tomato puree
• 1 tin chopped tomatoes (400g tin)
• 1 beef stock cube (crumbled)
• 1 tbsp Worcestershire sauce
• 1 tbsp Italian mixed herbs
• 2 cloves garlic (peeled and chopped)
• salt (to taste)
• low calorie cooking spray
• 500 g fat free natural yoghurt
• 1/2 tsp mustard powder
• 120 g low fat Cheddar
• 2 eggs