PREHEAT oven to 375°F. Unroll dough. Separate into 4 rectangles; firmly press perforations to seal.
COVER each of 2 dough rectangles with layers of VELVEETA, ham and tomato, leaving 1/2 inch around edges. Top each with remaining dough rectangle; crimp edges with fork. Place on baking sheet; cut each diagonally in half twice to form 4 small triangles. Do not separate triangles.
BAKE 15 minutes or until golden brown.