Green Onion, Garlic and Cheddar Buiscuits

Ingrediants:
2 cups of all purpose flour
1 1/2 sticks of diced and frozen butter (12 tablespoons)
1 tsp sugar
1/2 tsp salt
1 tablespoon of baking powder
4 green onions diced
2 cups of grated cheddar cheese
1 garlic clove minced
1 egg beaten
1/2 cup of cold buttermilk
* egg wash for the top (which is one egg with tblsp of water or milk)