So this is one of my all time favourite comfort foods. I load it up with mushrooms and peas. I love mushrooms and peas! It's best when it's slow cooked on a low heat for hours in the oven or a slow cooker. It's also super easy to make and so warm and comforting during the winter, rainy days or when you're not well. I often cook it in batches for myself or father... he loves it too.
This casserole is best served with mashed or roasted potatoes. It also freezes really well.