Heat oven to 350°F.
Separate dough into 16 triangles. Spread each triangle with about 1 teaspoon mustard. Top each with half slice of ham and half slice of cheese. Place chicken tenderloin along shortest side of each triangle. Roll up, starting at shortest side, rolling to opposite point. Using 2 ungreased cookie sheets, place 8 dough-wrapped chicken tenderloins on each cookie sheet.
Place 1 cookie sheet on upper oven rack and other cookie sheet on lower oven rack. Bake 10 minutes. Switch cookie sheets. Bake 8 to 11 minutes longer or until golden brown.