Mix ham, broccoli & onion. place rolls on baking stone. arrange triangles slightly overlapping with wide ends 4 inches from edge of stone. (points will extend off the edge). roll wide end of dough to center to create a 5 inch opening.
mix all ingredients together except lemon. spoon mix evenly over dough.
bring points of triangle up over filling and tuck under dough at center to form a ring. (filling will show).
sprinkle parmesian cheese over ring.
bake at 375 for 28-30 minutes or until golden brown.
remove from oven.
squeeze ring with fresh lemon.
garnish with lemon slices (slice thinly, cut in half and fold across ring).