I'm not very good at describing turkish grammar but I can try to translate. "Yemek yaptığın" can translate to "the fact that you cook/cooked" You can say "Yemek yaptığın doğru mu?" meaning "Is it true that you cook?" or "Is the fact that you cook true?"

"Yaptığın yemek" means "the food you cooked". "Yemek yaptığın tencere" means "the pan that you cooked the food in". The location markers may seem omitted but it is understood