For breakfast, I usually have oatmeal cooked with soy milk, with a banana chopped in, sweetened with honey. It's unreasonably good, super easy, very filling, healthy, and dirt cheap - probably less than 50 cents per breakfast.
A plate of sliced apples, avocados, whole wheat toast (ideally good specialty bread from a bakery), baby carrots, cheese, and pickled vegetables also makes for tasty, filling, easy, cheap meal.
I've always strongly disagreed with the notion that healthy food is prohibitively expensive. A quick trip to any grocery store proves that eating healthily is cheaper than eating a bunch of processed food, and I've found that you don't even have to put that much effort into cooking to get something that ticks all the boxes.
I can only conclude that most people are some combination of very lazy when it comes to cooking and ignorant about what's possible.
This is a research and effort issue.
Every bite is better than restaurant-quality to me because it's exactly how I like it.