Food and recipes

Can you recommend some good foods or products that fill you up very quickly but aren't so unhealthy?

If you want healthy gains, you need to focus on sustainability over speed. What's the point of gaining 50 lbs if you end up needing to lose 75 lbs later on?

Your best option is to eat a balanced diet with either bigger portions or more snacks paired with light to moderate exercise. This way, your body can better tolerate the added weight.

I meant recommendations for more or less healthy products for stuffings that cause a very rapid feeling of fullness

I said what I said. And if you do what I said, you will achieve what you are looking for.

Popcorn with nothing on it has about the same caloric density of air. It's also extremely fiber dense.

If you drink water with it, popcorn is extremely filling.

It's so filling and bereft of calories that anorexic individuals will "binge" on it to keep their hunger at bay while still maintaining a caloric deficit.