Cheesy Potato and Vegetable Casserole

Ingredients

• 1 tbsp olive oil
• ¼ tsp black pepper
• 1 leek, finely chopped
• 1 red/white onion, finely chopped
• 2 potatoes, peeled and chopped into 2cm cubes
• 1 carrot, peeled and chopped small
• 100g broccoli florets, chopped
• 1 tsp garlic, crushed
• Pinch of nutmeg
• Handful fresh parsley, chopped
• 1 tbsp plain flour
• 120ml milk
• 100g grated cheddar