Mom's Shepherd's Pie

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C).

2 . Stage

Place potatoes and water to cover in a large pot. Bring to a boil over high heat; lower heat and simmer until tender, about 15 minutes.

3 . Stage

Meanwhile, brown ground beef in a large skillet over medium-high heat; drain excess fat.

4 . Stage

Add tomato sauce, parsley, Worcestershire sauce, salt, ground black pepper, and green beans to the skillet.

5 . Stage

In a small bowl, mix water and flour together; stir into the skillet.

6 . Stage

Drain and mash potatoes. Spread potatoes over beef mixture. Poke 2 to 3 vent holes through top to release steam as casserole bakes.

7 . Stage

Bake in the preheated oven for 20 minutes. Brush milk over potatoes and bake 5 minutes longer.