Preheat oven to 350 degrees. Grease one 9 X 5 inch loaf pan and set aside.

In a small bowl, combine the boiling water and tea bags, then let sit 10 minutes. Remove tea bags and reserve 5 tablespoons to a small dish and set aside for glaze. Add smashed banana.

In a large mixing bowl, cream together butter and sugar. Add egg and vanilla, then beat until fluffy. Stir together flour, oatmeal, baking powder, baking soda, salt and all spices. Add dry ingredients, alternately, with banana and tea mixture. Fold in nuts and pour into prepared pan. Bake for 35-45 minutes, or until a toothpick comes out clean. In a small bowl, combine the powdered sugar and enough reserved chai tea to make a thin glaze. Spread over slightly cooled bread. Cool and serve.