Warm one tortilla in the microwave (15-20 sec, depending on power of microwave). Spoon 2-3 tsp of salsa on tortilla. Top with 1/4 of the spinach, 1/4 of the chicken and 1/4 of the cheese (add more or less cheese to your liking). Roll up the tortilla, tucking in edges as you go. Lay it seam side down in a lightly greased baking dish. Repeat for other 3 tortillas. Brush top of tacqitos with BBQ sauce. Bake at 350°F oven for 15 min. Cut tacqitos in half and serve. Great when dipped in sour cream!