Gougeres with Beef and Horseradish Filling

Name: Gougeres with Beef and Horseradish Filling
Ingredients: For the gougeres; 1/2 cup milk; 1/4 cup butter; 1/2 cup flour; 2 eggs; 3/4 cup finely grated gruyere; 1 tablespoon prepared horseradish; For the filling; 4 ounces softened cream cheese; 1/4 cup sour cream; 1/4 cup finely sliced green onions; 1/2 teaspoon white pepper; 1/4 teaspoon salt; 1/2 cup very finely diced deli roast beef; 2 teaspoons prepared horseradish