Everyone is always complaining of the cost & prep time necessary eating healthy! well here is a site to dismiss these excuses if you're interested! 246 Cheap and Healthy Recipes - 8 ingredients or less, and and 20 minutes or less to prepare.
Not all of these are healthy substitutes in my opinion, but some are, so use your own judgement. 20 Unique Healthy Food Alternatives --I'm interested to read about some of these things, and I know some of the substitutions only work in some circumstances.