1 (8 ounce) package cream cheese, softened
1 (4 ounce) can sliced mushrooms, drained
1 (8 ounce) package frozen chopped spinach, thawed
1 (8 ounce) package frozen Italian-style processed cheese food, cubed
Preheat oven to 350 degrees F (175 degrees C).
Bring a large pot of lightly salted water to a boil. Add cream cheese and mushrooms and cook 10 minutes. Stir in spinach and process until wilted.
In a medium bowl, mix the cream cheese, mushrooms, mushrooms and spinach. Spread the mixture into a 9x13 inch casserole dish.
Bake at 350 degrees F (175 degrees C) for 1 hour or until cheese is bubbly and bubbly. Cool 1 hour in refrigerator, then cool completely.