Ingredients
2 tablespoons extra-virgin olive oil, plus more for pan
2 cups whole-wheat pastry flour
2 cups spelt flour
1/2 cup plus 2 teaspoons sunflower seeds, toasted
1/2 cup plus 1 teaspoon black sesame seeds
2 tablespoons plus 1 teaspoon caraway seeds
2 tablespoons plus 1 teaspoon flaxseeds
2 teaspoons baking powder
1 teaspoon baking soda
2 teaspoons coarse salt
1 1/2 cups whole milk, room temperature
3/4 cup buttermilk, room temperature
2 tablespoons honey
2 tablespoons extra-virgin olive oil
Preparation
Preheat oven to 350 degrees. Lightly coat a 9-by-5-inch loaf pan with oil. Line with parchment, leaving a 1-inch overhang on long sides. Oil parchment.
In a large bowl, whisk together flours, 1/2 cup each sunflower and black sesame seeds, 2 tablespoons each caraway and flax seeds, baking powder, baking soda, and salt.
In another large bowl, stir together milk, buttermilk, honey, and oil until honey is dissolved. Add flour mixture; beat until combined, about 1 minute. Transfer to prepared pan; sprinkle with remaining seeds, pressing gently to adhere.
Bake, rotating pan halfway though, until a tester inserted in center of the loaf comes out clean, about 1 hour, 5 minutes. Let cool in pan on a wire rack 20 minutes, then turn out bread and let cool completely. (Bread can be tightly wrapped and stored at room temperature up to 3 days or frozen up to 1 month.)