Yes, absolutely. If you double or triple your batch of salsa chicken, you can freeze any leftovers. Defrost overnight in the refrigerator and then reheat in saucepan on stovetop when ready to eat. If you find the filling is too liquid-y after you have defrosted it, just cook off some of the liquid by simmering it over medium-high heat on the stove. Any extra liquid should evaporate quickly. Then proceed with the rest of the recipe.