Step 1

Place 2½ cups lukewarm water in a medium/large mixing bowl. Add the yeast and sugar. Stir slightly but do not mix. Let sit 5-10 minutes (it should foam or at least get creamy; if it doesn’t your yeast is dead and you should start again—check the expiration date!).

Step 2

d="instruction-step-2">Add flour and kosher salt and mix with a wooden spoon or rubber spatula until a shaggy dough forms and no dry streaks remain. It will seem a little wet. That is normal.

Step 3

="instruction-step-3">Pour 4 Tbsp. extra-virgin olive oil into a big bowl that will fit in your refrigerator. Transfer dough to bowl and turn to coat in oil. Turn over a few times, but do NOT mix in the oil with the dough.  Cover plastic wrap and chill until dough is doubled in size (it should look very bubbly and alive), at least 8 hours and up to 24 hours. If you’re in a rush, you can also let it rise at room temperature in a warm place until doubled in size, 3–4 hours. The longer you let it raise in the fridge the more it flavorful it will be.

Step 4

ruction-step-4">Grease your desired baking pan or baking sheet depended on preference (classic 9X13 glass baking dish  or 9X13 cookie sheet ) with butter. Add the 1 Tbs olive oil to the baking pan and coat bottom. Take out dough from the fridge, uncover, and punch down one time. Then turn the dough over a few times in the bowl. Move dough to the prepared pan. Pour any oil left in bowl over and turn dough to coat it in oil. Let rise, uncovered, in a dry, warm spot (like near a radiator or on top of the fridge or a preheating oven) until doubled in size, at least 1½ hours and up to 4 hours.

Step 5

ction-step-5">Place a rack in middle of oven; preheat to 450°. To see if the dough is ready, poke it with your finger. It should spring back slowly, leaving a small visible indentation. Lightly oil your hands. If using a rimmed baking sheet, gently stretch out dough to fill (you won’t need to do this if using a baking pan). Dimple focaccia all over with your fingers. This is my favorite part! Keep poking away until there are lots of poke marks in the dough.

Step 6

n-step-6">6.Drizzle the top of poked dough with remaining 1 Tbsp. extra-virgin olive oil and sprinkle with flaky sea salt and herbs. Place the tomato slices gently on top of the dough and distribute garlic over the top. Bake focaccia until puffed and golden brown all over, 20–30 minutes. Optional: brush lightly with olive oil at the right after taking it out of the oven. Enjoy warm or cold!