In a mixing bowl, combine cheeses, butter, and water until well blended. Combine, flour and salt; add to cheese mixture. Stir in oats and sunflower kernels. Knead the dough until it holds together. Shape into a 12-inch log. Cover with plastic wrap; chill for four hours or overnight.
Allow dough to stand at room temperature for 10 minutes before cutting into 1/8-inch slices. Place on greased, foil-lined baking sheets. Bake at 400° for 8 to 10 minutes or until edges are golden brown. Slide crackers and foil off baking sheets to wire racks to cool.
Yield: Eight dozen.