Mix the lukewarm water with the cane sugar, instant yeast, and Greek yogurt in your mixing bowl. Let it sit for 10 minutes until it becomes slightly frothy.
Add the flour and salt and knead for 5 minutes until you have an elastic dough.
Cover and let rise for the first time until the dough has doubled in volume (about 45–60 minutes, depending on the temperature).
Mix the dough briefly again on low speed (2–3 turns) and let it rise again. Repeat this process a total of 3 times. This replaces the classic stretching.
Line a large baking dish with parchment paper and drizzle with olive oil.
Pour the dough into it.
Fold the dough: right to left, left to right, bottom to top, and top to bottom. Then gently push into the corners. Let it rise again until the dough is airy and 'jiggly'.
Grate the lemon zest over the dough. Distribute the rosemary leaves and push the sardines into pieces into the dough. If desired, spoon some oil from the can over it.
Make typical focaccia dimples in the dough with your fingers with some more olive oil.
Bake for 25 minutes in a preheated oven at 200°C. Remove the focaccia from the mold for the last 5 minutes so the bottom becomes nice and crispy.
Tips
- Use truly lukewarm water, too hot water kills the yeast.
- The longer your rising times, the airier your focaccia will be.
- The oil from the sardines adds extra flavor, definitely use it!
- Storage
In the refrigerator: up to 2 days airtight packaged
In the freezer: up to 1 month - Reheat: 10 minutes in an oven at 180°C for a crispy crust