Preheat your oven to 200°C (400°F), and line a baking sheet with parchment paper. This easy step guarantees that our onions and potatoes won’t stick to the pan, enabling even cooking and effortless cleanup.

Place the onions and the thinly sliced potatoes in a large bowl. Drizzle the mixture evenly with olive oil, making sure that every thin slice gets a good amount of moisture. A light dusting of salt and pepper gives the whole thing body, and a gently toss makes sure the ingredients get into all the nooks and crannies.

Gently place the seasoned potatoes and onions in a single layer on the prepared baking sheet lined with parchment paper. This design guarantees that every slice gets the chance it deserves to have a crispy, golden surface and a soft, caramelized interior. Place the tray in the oven that has been warmed, and watch the magic happen for 25 to 30 minutes, or until the potatoes are golden and the onions are perfectly caramelized.

Now that the oven is doing its culinary magic, it’s time to make the standout ingredient, the mustard yogurt sauce. Whisk the yogurt and mustard in a small bowl until they combine harmoniously and become velvety. To suit your taste, change the amounts accordingly. You can add more mustard for a spicier kick or use less for a more subdued flavor.

The moment of expectation arrives as the scent of roasting potatoes and onions permeates the space. The golden gems should be carefully taken out of the oven and placed on a serving tray that is ready. Drizzle the mustard yogurt sauce over the top, letting it trickle over the crunchy sides and soak into the soft creases.

Sprinkle some bright fresh herbs, such parsley or chives, over the dish to give it a last flourish of style and freshness. With their vibrant flavors, these green accents entice the eyes as well as the tongue. It is now time to unveil our work to excited diners and invite them to savor the heavenly bliss of our potato and onion delight, with the stage set and the ensemble cast in place.