Mix the base
Mix starter, water and flour. Rest 30 minutes.
Time: 30 minAdd salt and oil
Pinch in the salt and olive oil, then rest 30 minutes.
Time: 30 minBuild strength
Complete 3 stretch-and-fold sets, 30 minutes apart.
Time: 30 minBulk ferment
Bulk until the dough is airy, puffy, bubbly and very jiggly.
Pan and proof
Generously oil a large pan, add the dough, rest 20–30 minutes and stretch toward the corners. Final-proof until puffy and bubbly, usually 45–90 minutes.
Time: 20–30 minConfit the garlic
Place the peeled garlic cloves in a small skillet and add enough olive oil to mostly cover them. Cook over very low heat for 20–30 minutes until soft and lightly golden. Reserve the garlic oil.
Time: 20–30 minDimple and top
After final proof, drizzle the dough with garlic oil and dimple deeply. Press whole garlic cloves into some dimples. Scatter rosemary evenly, press it lightly into the dough, add flaky salt and another light drizzle of garlic oil.
Bake
Bake at 425°F / 218°C. During the final 5–7 minutes, sprinkle the Parmesan over the top and return the focaccia to the oven.
Time: 5–7 minFinish
Remove when deeply golden and 205–210°F internally. Cool briefly before transferring to a rack.
Time: 210°F