Let the dough sheets rest at room temperature for about 10 minutes. Peel and finely dice the shallots. Heat 1 teaspoon of oil in a pan and sauté the shallots for 2-3 minutes. Drain and chop the tuna. Wash the chives, shake dry and cut into small rolls
Melt the butter. Roughly chop the capers. Mix tuna, shallots, capers and chives. Season with salt and pepper. Remove 4 pastry sheets from the package. Close the package tightly and store in the refrigerator until further use. Quarter the dough sheets and brush the edges with butter. Cut cheese portions into pieces
Put the tuna mixture on one side of each pastry sheet and spread the cheese pieces on top. Roll up the sheets, beating the sides over the filling
Heat the oil in a frying pan and fry the rolls for 3-4 minutes in portions until golden brown. Remove, drain on kitchen paper and serve immediately