01 - Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
02 - In a large mixing bowl, whisk together the flour, baking powder, salt, and ground cumin until evenly distributed.
03 - Add the cold, cubed butter to the flour mixture. Using a pastry cutter or your fingertips, rub the butter in until the texture resembles coarse crumbs with some pea-sized pieces remaining.
04 - Pour in the hummus, milk, and beaten egg. Stir gently with a spatula just until the dough comes together. Avoid overworking the dough to keep the scones tender.
05 - Gently fold in the chopped herbs and crumbled feta cheese, if using, distributing them evenly throughout the dough.
06 - Turn the dough out onto a lightly floured surface. Pat it into a round disc about 1 inch thick. Using a 2.5-inch round cutter, cut out scones and place them on the prepared baking sheet. Re-pat scraps and continue cutting until all dough is used.
07 - Bake on the center rack for 18 to 20 minutes, until the scones have risen and are lightly golden on top.
08 - Allow the scones to cool on the baking sheet for 5 minutes before transferring to a wire rack. Serve warm with extra hummus, sliced cucumber, or roasted peppers.