Anna's Sweet Potato Pie

Ingredients:

• 1.3 kg sweet potatoes of various colors, peeled
• 165 g butter

Preparation:

1. Preheat oven to 200°C.
2. Thinly slice the sweet potato using a mandoline, a food processor, or a sharp chef's knife. Place the butter in a cast-iron or other oven-safe skillet and melt in the preheated oven. Remove the skillet and swirl it to coat the entire surface, then pour it into another container.
3. Lay the sweet potato slices in concentric circles, overlapping each other, in the skillet, brushing each layer with a little melted butter, seasoning with salt and black pepper, and pressing down until all the sweet potato and butter are used. Place a layer of foil directly on top of the sweet potato slices and place the empty skillet on top to press the sweet potato slices down.
4. Bake until the potato pie comes out easily with a knife, about 45 minutes. Run a metal spatula around the edge of the pie, then carefully invert it onto a serving platter.