CARAMELIZED ONION & CHEESE SQUARES

Steps:

• Preheat the oven to 425°F.
• To make the crust:.
• In a medium bowl, stir together the flour, baking powder, and salt. Make a well in the center of the mixture.
• In a measuring cup, whisk together the milk, olive oil, and melted butter. Slowly pour the milk mixture into the well, stirring until just blended and the mixture comes together into a rough mass.
• Turn out the dough onto a lightly floured work surface and roll out into a 10-by-13-inch rectangle.
• Transfer the dough to a baking sheet/tray. Pierce the dough all over with a fork.
• To make the topping:
• In a large skillet over medium heat, melt the butter with the olive oil. Add the onions and cook, stirring frequently, until softened and lightly browned, about 10 minutes.
• Add the thyme, sugar, and salt and pepper to taste, reduce the heat to low, and cook, stirring frequently, until the onions are soft and caramelized, about 20 minutes.
• Spread the onion mixture evenly over the dough.
• Sprinkle with the cheeses, cut into squares with a pizza wheel or a sharp knife, and bake until the crust is golden and the cheese is bubbling, about 20 minutes.
• Transfer to a wire rack and let cool a bit on the pan. Serve warm or at room temperature.