2 hours? It takes a few minutes to bake most lean meats and eggs. Potatoes aren't too difficult to cut and cook. Same for rice. Many vegetables can be eaten raw. All of it can be done in parallel. Who are you talking about in this, a family of 5 using blunt knives?

Even many confection recipes don't take more than 90 minutes, and those are known to take ages (and aren't in any way 'healthy').