Combine water and milk and heat to 110°F. Add one teaspoon granulated sugar and the packet of yeast. Stir vigorously then let sit for about 10 minutes, until foaming and bubbly.
In the bowl of a stand mixer, whisk together flour, light brown sugar, salt, cinnamon, cloves, and ginger. Add the orange zest and butter pieces and mix to combine.
Using the dough hook attachment, make a small well in the center of the dry ingredients and pour in the yeast/milk mixture, the egg and egg yolk, and the vanilla. Mix on medium speed until dough starts to pull away from the sides of the bowl. The dough will be slightly sticky. Add the raisins and candied peel (or dried fruit) and mix to combine.
Tip the dough out onto a lightly floured work surface and knead for 5 to 6 minutes, until supple and elastic. Shape into a ball and place in an oiled bowl, flipping dough ball over to coat both sides. Cover with plastic wrap and let rise at room temperature until doubled in size, usually 1 to 2 hours.
Line a 9x13 baking tray with parchment. Tip dough out and gently punch it down with your knuckles. Shape into a loose log shape and cut into 12 roughly equal pieces. (If weighing, the pieces should be about 3 ounces each.) Shape each piece into a ball by smoothing over the top of the ball and cupping under the ball, tucking in the seams underneath. Turn the ball and continue to shape and smooth. Place on the lined baking tray. Repeat with the remaining pieces, placing them a little bit apart from each other on the tray, 3 across and 4 down.
Cover the buns on the tray with plastic wrap or a kitchen towel and let rise again, until puffy and almost doubled in size, usually about 45 minutes to an hour. While buns are rising, preheat the oven to 375°F.