Preheat oven to 200℃
Heat oil in a cast iron pan or saucepan. When hot, add onion, garlic, carrots, celery, bay leaves and thyme until vegetables soften. Add ‘minced’ Fable and cook for further 10 minutes.
Add tomato paste, Worcestershire sauce, stock and wine and stir to combine. Reduce heat to low and simmer until sauce begins to thicken, around 15 minutes. Add lentils and cook for a further 10 minutes until the sauce is thick. Stir through chopped parsley and season with salt to taste.
Meanwhile, prepare mash by placing chopped potatoes in pot of cold water and bring to a boil. Cook until tender. Drain potatoes, and return to pot. Add Nuttelex or butter and mash until creamy. Set aside.
Transfer Fable pie mix to a casserole dish (if not using an oven transferrable pan), and top with mashed potato. Use a fork to run light tracks through the mash and drizzle with the remaining melted Nuttelex or butter.
Bake in oven until top is golden brown, around 10-15 minutes.