Sourdough Focaccia Recipe Shared by Multiple Outlets

• Multiple outlets reported on a sourdough focaccia recipe.
• The recipe is adapted from the book 'The Perfect Loaf' by Clarkson Potter, 2022.
• The focaccia is described as thick, bubbly, and versatile.
• It can be cut into squares for appetizers or sliced for sandwiches.
• The focaccia is typically drizzled with olive oil.