Beat eggs and water in a large bowl until light and foamy. Add flour and salt. Batter will be very thin. Heat a large frying pan, brush with oil. Add batter to cover pan, when set, turn over. When bottom is covered in small brown dots, remove to a plate. Spoon approx. 3 TBS. cottage cheese in center, fold in sides and then ends. Place seam down in 13 x 9 pan. Repeat with the rest of the batter. You should have twelve rolls. Cut butter into 12 pieces, place a piece on each roll. Cover pan with foil. Bake at 350 for 30 – 45 minutes until butter is melted and the rolls are heated through.