Vegetables and meat. Or vegetables and eggs. You will feel really full from a bunch of eggs even though one boiled egg is only 78 calories. (A fried egg is 100 calories, a raw egg is 50 calories. The cooking makes the calories easier to absorb. But I digress.)
Do NOT eat constantly. That's bro science. Eat only within eight hours per day. Or if you can, skip eating for a day. This is doable because sustaining on fat and protein creates ketones in your blood, the cells that convert body fat to fuel. But only if you don't eat any sugar, which kills ketones.
Experiments show that intermittent fasting helps you lose weight. For example: two groups of mice got the same amount of calories per day, but one group ate them within eight hours per day, while the other group ate continuously throughout the day. The group that did intermittent fasting lost weight. Even though they ate as much as the other group.
Intermittent fasting also reduces the inflammations in your joints and the rest of your body, a primary driver of aging. It also makes your body "eat" old debris in the cells, and repair the cells, making them last longer instead of having to be replaced. The constant replacing of cells with new cells is aging, as you know. Animals that do intermittent fasting live 15 percent longer, and it's not just old age that is lengthened but their youth and middle age as well. So it is very useful, not just for losing weight.
Read roguehealthandfitness.com for more about this. Mangan is a man in his sixties who lifts more than, well, anyone here I'm pretty sure, and is very healthy. He digs up so much useful information, and he analyzes studies that are iffy (noting what kind of test subjects they have and what kind of reporting they do, etc), so that you can focus on the studies that are done right. Well recommended.