Filling Foods/Recipes? (Simple)

Hi, all: Some time ago I read a similar post, but looking for more ideas.

I've always tended to have a big appetite and can really pack it away, which is part of the reason I'm here. Looking for more ideas for simple, filling foods/meals between 300-400 calories. My recent rotation includes baked sweet potatoes topped with various and sundry, spaghetti squash with tomato, maybe veggies and a bit of cheese, and lean cuts of chicken (which have not been on my radar in the past since I have tended to focus on veggies, though my approach to meat has been shifting). Anyway, what's your fave when you want to feel full on 300-400?