Stuffing

Food for stuffing, not gaining

Vegetables/Fruit
Stuff like cabbage is practically water

But really it comes down to your metabolism and how often you want to do it. Having one enormous meal once a week isn't going to do much. I had to have a very large meal 3 times a week before I started noticing any significant weight gain.

But I also don't much care for the taste of junk food
10 years