Preheat the oven at 200 degrees Celsius.
Mel the butter in a casserole.
Pour the flour in a bowl and mix it with the milk and baking powder. While stirring add the butter, then the eggs one by one.
Place a baking paper on a baking sheet, pour the batter on the paper and place in the middle of the oven for 15 minutes.
While the pancake is in the oven it is time to prepare the filling.
Grate the carrots and cut the ham, cucumber, paprika, tomatoes and the leek in small pieces.
Mix the chili sauce, the yogurt and the salt in a bowl, add the vegetables and mix together.
Take out the pancake from the oven and place the filling on it and roll the it as a big roll.
Cut in preferred sizes and serve.