I'm so sorry your family is going through this. Right now, the most important thing is that your dad eats. If a homemade smash burger or chili is what sounds good to him, I would absolutely consider that a win. Calories and protein are often more important than trying to follow a "perfect" diet during treatment.

Another resource you may find helpful is Seena's Care Kitchen, a program from the Seena Magowitz Foundation. It was created specifically for pancreatic cancer patients and caregivers and offers easy-to-follow recipes, nutrition guidance, and cooking tips designed to address common challenges like poor appetite, taste changes, digestive issues, and treatment side effects.

I hope your dad finds foods that appeal to him and that he's able to keep his strength up. Wishing him and your family all the best as you navigate this journey.