Some cereal can be healthy ... look for something with whole grains, etc. Flake-type cereals are processed and then fortified.
It doesn't hurt to have a bowl of cereal now and then ... but every night for supper???
If you want to eat, and not feel the hunger pangs, cook something like chicken or turkey. Serve it with a whole grain pasta and veggies. On the days where you don't want to cook, go with something like flakes of tuna in water on whole grain bread, served with veggies. Boiled eggs are another good one, served with toast and finished off with an apple or two.
There are lots of possibilities.