Tomato Potato Casserole
Preheat the oven to 200°C (approximately 400°F). Grease a baking dish with butter. Rinse the tomatoes, remove the stalk and cut into slices.
Peel the potatoes and cut into slices. Halve the leek, rinse and cut into pieces. Lightly salt the vegetables. Drain the capers. Layer all the vegetables in the baking dish.
Mix the sour cream, yogurt and egg. Season with pepper and pour over the vegetables. Sprinkle with cheese and bake for about 40 minutes. Serve warm.