Preheat your oven to 350°F (175°C). Prepare your baking dish by greasing it or lining it with parchment paper.

Slice the peaches into wedges and combine with Greek yogurt, sugar, and cinnamon. Stir gently and set aside.

In a separate bowl, mix oats, cold butter, and sugar. Rub the butter into the mixture until it resembles coarse crumbs.

Layer the peach filling in the baking dish and sprinkle the oat crumble topping evenly over the peaches.

Bake for 30-35 minutes until the topping is golden and the peaches are bubbling.

Let the crisp cool for at least 10 minutes before serving.

Serve warm, topped with Greek yogurt or vanilla ice cream.