Cook the Green Isle Frozen Brussels Sprouts in a pot of salted boiling water for about 8 minutes until tender.
Drain the water and place the sprouts in ice water to stop the cooking process. Once the sprouts are cold, drain again and cut in half.
While the sprouts cool, place the bacon in a frying pan and cook over a medium heat until lightly browned. Reduce heat and stir in the chopped Brussels sprouts. Season with salt and pepper and cook for a further minute.
Lightly grease a baking dish and distribute the bacon and Brussels sprouts evenly. Pour cream over the mixture and top with the breadcrumbs, followed by the cheese.
Break the butter into small pieces and dot over the breadcrumb topping. Top with walnuts if desired.
Bake for 20-25 minutes until golden brown and heated through.