Preheat oven to 400°F. Slice off the top quarter inch of the garlic head to expose the cloves.
Place garlic in a small oven-safe dish, drizzle with 1 teaspoon olive oil, and add a pinch of salt. Cover tightly with lid or foil.
Roast for 30-45 minutes until cloves are soft, golden, and sweet-smelling. Let cool completely, then squeeze out the roasted cloves and chop roughly.
In a large mixing bowl, combine yeast, honey, and warm water. Stir gently and let sit for 5 minutes until foamy and bubbly.
Add kosher salt, chopped rosemary, and roasted garlic cloves to the yeast mixture. Stir to combine.
Add flour in three batches, mixing with a wooden spoon after each addition until a shaggy, sticky dough forms with no dry flour visible.
Drizzle 1 tablespoon olive oil over the dough and turn several times to coat all sides. Cover bowl with a clean kitchen towel.
Let dough rise in a warm, draft-free spot for 1 hour or until doubled in size and full of air bubbles.
Generously dust a cutting board with flour. Gently tip risen dough onto the board without punching it down.
Fold the dough like an envelope, pulling edges toward the center 4-5 times. Flip over and cup hands around dough, rotating gently while pulling toward you to create surface tension. Form into a smooth ball.
Place dough seam-side down in a flour-dusted bowl or proofing basket. Cover and let rise for 30 minutes.
Meanwhile, place empty Dutch oven with lid in the oven and preheat to 450°F.
Carefully remove hot Dutch oven using thick oven mitts. Remove lid and gently tip dough into pot seam-side up (this creates rustic cracks).
Cover with lid and bake for 30 minutes.
Remove lid and continue baking uncovered for 10-20 minutes until deep golden brown.
Carefully transfer bread to a cooling rack. Let cool for at least 20 minutes before slicing to allow the interior to set.