Leek, potato and pea soup

Ingredients

• 1.5 tbsp vegetable oil
• 2-3 large leeks, washed and sliced (about 250g prepared weight)
• 2 large potatoes, washed and diced, skin on (about 400g prepared weight)
• 400ml water
• 1 tsp bouillon powder
• 1 tsp dried mixed herbs or 1tbsp fresh parsley, finely chopped
• 600ml semi-skimmed milk (could be swapped for plant-based milk of choice)
• 200g frozen peas