Coat a lg skillet with cooking spray; heat over med-high heat. Add garlic, cook, stirring until fragrant about 30 sec - 1 min. Add beef; cook until browned, about 5-6 minutes. Add cumin, coriander, salt and diced tomatoes; cook, stirring occasionally until liquid is almost absorbed about 5 - 6 min. Toast tortillas (if desired) and place on flat surface. Top each with about 1/4 cup beef, 1/4 cup lettuce, 1 tbl cheese and 2 tsp salsa. Fold tortilla in half and repeat. 2 tacos per serving.