M.H.
Hi K.,
My kids went through this too! What we did is a little bit different than the other suggestions. Whenever they would spit their food out we would take their food away and tell them that they were done. We would take them away from the table and let them play. Sometimes they would get upset sometimes they could careless that they were excused from the table. Most of the time they were upset that they were excused. After waiting about 30 minutes we would ask them if they were ready to eat and bring them back to the table. When they realized that spitting their food out or playing with their food is not ok and that they would have to leave the table they would eat just fine. By doing this you are teaching your children consequences for their bad behavior even at 14 months. When she does this take her food away tell her we do not play/throw our food and take her out of her high chair. Obviously you don't have to wait 30 minutes but try 10-15 minutes. Bring her back to the high chair and ask her if she is ready to eat and try to give her her food again. If she throws/plays again repeat the process. She will figure it out. I hope this helps!
Good Luck!
M.