Potato and cheddar pie - Potato Nation

Ingredients

• 45 ml sunflower oil
• 1 onion, finely chopped
• 3 onion, finely chopped
• 450 g pork mince
• 250 g button mushrooms, sliced
• 10 ml ground paprika
• 5 ml cayenne pepper
• 250 g spinach, washed and chopped
• 8 baby potatoes, skin on, quartered and parboiled
• 250 ml sour cream
• 15 ml fresh lemon juice
• 15 ml fresh parsley, finely chopped
• 50 g cheddar, grated
• Salt, to taste
• 400 g store-bought shortcrust pastry
• 1 large egg, lightly beaten