In the meantime, get ready your onions: Heat a massive sauté pan around medium warmth. After very hot, add 2 tablespoons olive oil. As soon as the oil is heated, incorporate the onions and 1 teaspoon kosher salt. Prepare dinner onions, stirring just about every moment or two, until finally a medium brown, just about caramel colored, about 25 minutes. [See Note at end.] Scrape onions onto a plate to great although you finish the bread.
End the focaccia: When the dough is doubled, line a 9×13 cake pan with parchment paper and drizzle 2 tablespoons olive oil over it. Do not deflate your dough, just scrape it on to the oiled parchment. Drizzle the prime of the dough with a different tablespoon of olive oil and use your fingers to dimple the dough, flattening it out. It is all right if it does not achieve the edges. Permit the dimpled dough rest at area temperature for 15 minutes and warmth your oven to 425°F. After 15 minutes, dimple the dough only where by desired a small even more into the corners. Enable relaxation for a closing 15 minutes ahead of scattering the top with onions, poppy seeds, and a handful of pinches of salt.
Bake the focaccia: For 25 minutes, right up until deeply golden brown at the edges and throughout the prime. Although it bakes, you can get ready any toppings you’d like to serve it with, such as product cheese or butter, lox, thinly sliced tomatoes, cucumbers, onions, or capers.
To serve: Loosen the focaccia if it’s trapped in any place and slide it into a slicing board. Reduce into 12 squares, making use of a sharp knife to get via the onions on major without pulling them off, and replacing any that scatter. Eat proper away.
Do in advance: Focaccia retains at home temperature for 1 to 2 days. Reheat on a baking sheet at 350°F for 10 to 12 minutes.
Be aware: These are not caramelized onions we do not need to have 60 to 90 minutes above minimal warmth with continual stirring. That is not how any ancestor of mine cooked onions. I’m intentionally making use of a increased heat for more swiftly developed taste. If they’re not buying up color by 20 minutes, bump up the heat a bit. If they are coloring as well fast to make it to 20 to 25 minutes, decrease the warmth. We want to stopping shy of a dim bronzed color, as the onions will end in the oven and we never want them to melt away.