Pugliese-style potatoes baked with tomatoes, onions, and oregano until golden. This vegetarian mediterranean family side is a fresh, healthy dish that captures southern Italy's sun-drenched flavors.
Preheat your oven to 400°F (200°C) with a rack in the center position.
Peel the russet potatoes and slice them into 1/4-inch thick rounds for even baking.
Slice the roma tomatoes and yellow onion into thin rounds to match the potato thickness for uniform texture.
Layer half of the potatoes in a lightly oiled 9x13-inch baking dish, then scatter half of the onions and tomatoes on top. Sprinkle with half the oregano, salt, and pepper. Drizzle with half the olive oil.
Repeat with remaining potatoes, onions, tomatoes, seasoning, and oil, finishing with extra oregano and tomatoes.
Cover tightly with foil and bake for 35 minutes to allow moisture to steam the potatoes gently.
Uncover, increase oven heat to 425°F (220°C), and bake another 20–25 minutes until the top is golden and edges are crisp, ensuring potatoes are cooked through without becoming mushy.
Let rest 10 minutes outside the oven before serving to allow flavors to meld and the dish to firm up slightly.