Grill...? I don't remember getting such a request. He just told me to go fishing for salmon from the Slime Forest, and then bring 5 back to him on his second request. He wants fish to grill for himself, if I recall. So just carry at least 5 Salmon fish in your inventory to him and he should automatically consider the request done🙌! The third request after should be the Blu jello (or whatever that dropping from slime monsters is called *I forget😅🙈*. That request is basically to collect 15 of those droppings from slime monsters you defeat. Hope this helps 😊!