Preparation:
In large bowl, combine all-purpose and whole wheat flours, oatmeal, baking powder, salt and poppy seeds. In separate bowl, whisk together buttermilk, honey and egg. Add all at once to dry ingredients; mix quickly, just until combined. Spoon batter into greased 8 x 4 in (1.5L) loaf pan. Brush top with melted butter. Bake in 350F (180C) oven 45 to 50 minutes or until cake tester inserted in centre of loaf comes out clean. Let cool 5 minutes in pan. Turn out onto wire rack.