Potato and Spinach Bake

Ingredients
7 large potatoes, peeled and cubed
1 (10 ounce) package frozen chopped spinach, thawed and drained
1 cup sour cream
1/4 cup butter
2 tablespoons chopped green onions
2 teaspoons salt
1/4 teaspoon black pepper
1 cup shredded Cheddar cheese

Directions
Preheat oven to 400 degrees F (200 degrees C). Grease a 2 quart casserole dish.
Bring a large pot of salted water to a boil. Add potatoes and cook until tender, about 15 minutes.
Drain and mash.
In a large bowl combine mashed potatoes, spinach, sour cream, butter, green onions, salt and pepper. Spoon into prepared dish.
Bake for 15 minutes. Top with cheese and bake 5 minutes longer.