You can tell him so, but make the extra effort to eat it, even if you dislike it. I’m sure it’s not a bowl of cherries having to cook for everyone——planning the meals, preparing them, and cooking them——so the least you can do is try your best to eat most of it. When I was a kid, we didn’t have much and money was scarce, and even when I hated what my Mom cooked for me, I still tried my best to eat it. I knew how hard she toiled all day doing the housework and finally putting supper on the table for us kids. It’s a sacrifice, one that should be respected, and not dismissed just because you don’t “like it”. If it made you physically ill to eat it, then that’s more legitimate, but just because the food is disagreeable to your palate doesn’t warrant not eating it, considering the time and energy your Dad spent in making it.