Mix the burgers ingredients together; form into burgers of equal size about 1 cm thick without compacting the meat. Sprinkle the seasoning mixture of spices on both sides of patty. Grill or broil, 10 cm from souce of heat, for 3 minutes on each sides for medium-rare patties. Place the mozzarella cheese on center of each patty. Cook for another minute and until cheese melts. Serve each patty on a warmed 20 cm flour tortilla, topped with a tomato slice, cilantro sprigs, and taco sauce