Sweet Potato Shepherd’s Pie

Preheat the oven to 350°F and grease a glass baking dish.

Use a tablespoon of the butter in the bottom of a skillet to brown the chopped rutabaga, onion and garlic. Add the ground meat and cook until lightly browned, then add the tomatoes, stock and thyme and cook until the tomatoes are soft. Remove any fat. Season to taste with salt, pepper, and a little Worcestershire sauce. Remove the meat mixture to the glass baking dish. Mix the flour with a little water to make a paste to add to the cooked meat liquid to thicken. Whisk well and add to casserole dish, blending well.

Mix salt, egg yolk, and remaining butter into the mashed sweet potatoes. Spoon the sweet potato mixture over the casserole.

Bake for 25 to 30 minutes until lightly browned.