1Heat oven to 400ºF.
2Cut butter into flour, oats, 3 tablespoons sugar, the baking powder, lemon peel and salt in medium bowl, using pastry blender or crisscrossing 2 knives, until mixture looks like fine crumbs. Stir in 1 egg, the almonds and just enough half-and-half so dough leaves side of bowl.
3Turn dough onto lightly floured surface. Knead lightly 10 times. Roll or pat 1/2 inch thick. Cut with floured 2 1/2-inch round cutter. Place about 2 inches apart on ungreased cookie sheet. Brush dough with 1 egg; sprinkle with sugar.
4Bake 10 to 12 minutes or until golden brown. Immediately remove from cookie sheet; cool.