Assemble the ingredients.
Whisk together the first 6 (the dry) ingredients.
Cut the butter into the flour mixture. Leave butter at pea sized pieces.
Stir in the cheese and chives
Add the water.
Mix lightly till dough comes together. Turn out onto a floured board.
Pat dough into an 9 square. Cut into 9 3 squares. Cut each square in half, diagonally.
Place each piece on a baking sheet. Give them plenty of space between each as they will flatten and spread. Picture is actually too close.
Brush with an egg wash made with the egg and 2T water. Bake in a 375 oven till starting to brown, about 20 minutes.