Activate your oven's proofing feature or just use the oven light. Cut a sheet of parchment paper to fit a large baking sheet. Lay the parchment on a clean surface and place the baking sheet nearby. In a stand mixer with a dough hook, combine 1 cup of warm water and 3 tablespoons of honey; give it a quick stir. Add 1 sachet (5 grams) of active dry yeast, stir, and let it proof for 10 minutes. Alternatively, you can mix and knead by hand in a large mixing bowl.
1 cup water, 3 tablespoons honey, 1 packet (5 grams) active dry yeast
Weigh 520 grams for precise measurement or measure 4 1/8 cups of all-purpose flour using the spoon and level method. See my NOTES on measuring flour below.
4 1/8 cups (520 grams) all-purpose flour
Measure 120 grams or 2/3 cups of feta cheese, halved. You will use 60 grams or 1/3 cup in the dough and the same amount in the spinach pesto.
2/3 cups (120 grams) feta cheese
Once the yeast is proofed, add 1 egg, 1 teaspoon of Kosher salt, 1 tablespoon of olive oil, and half the feta, crumbling it as you add it. Mix on low for 1 minute.
2 large eggs, 1/2 teaspoon (3 grams) Kosher salt, 1 tablespoon (15 ml) olive oil
Add all the flour to the mixer and mix on low. Once the dough forms a cohesive ball and pulls away from the sides, stop mixing, remove the dough hook, and cover the bowl with a damp cloth. Let it rise in the oven for 1 hour.
Measure or weigh 300 grams (2 1/2 cups) of fresh spinach, using both leaves and stems. Chop finely on a large cutting board for the pesto.
2 1/2 cups (300 grams) spinach
Melt 1 tablespoon of butter in a large non-stick pan, then turn off the heat. Transfer finely chopped spinach, 3 chopped garlic cloves, 3 tablespoons (30 grams) of Parmesan, dried oregano, and remaining feta (crumbling it as you add it) into the pan. Stir to coat for a dry spinach pesto. Remove from burner and set aside.
1 tablespoon (15 grams) butter, 3 cloves garlic, 6 tablespoons (60 grams) parmesan cheese, 1 large pinch oregano
Flour the work surface next the parchment. Roll the dough into a 15 x 22-inch rectangle, using a ruler for accuracy. The shape does not need to be perfect, but the size is important.
Spread spinach pesto evenly on the dough. Roll from one long side, snugly but not too tight, and pinch ends to seal. Use a sharp knife to cut the roll lengthwise into two long ropes.
Center the two dough ropes on parchment, ensuring space at the ends. Pinch together first, then tuck the ends under to start. Alternately cross the ropes, keeping pesto side up. Shape into a twist or braid about 15 inches long. Transfer to the baking sheet and let rise until doubled, about 1 hour.
Preheat your oven to 375°F. Although the braided pattern may look distorted given the rise, it's designed for a finished bake that mimics focaccia's texture. Whisk the remaining egg, then brush it over the loaf, and top with the remaining 3 tablespoons of Parmesan cheese for a golden crust.
2 large eggs, 6 tablespoons (60 grams) parmesan cheese
Bake the loaf at 375°F for 40 to 50 minutes until golden brown and aromatic. Once baked, transfer it to a wire rack to cool slightly before slicing.