Look at getting the Freezer Bag Cooking cookbook. Tons of ideas there and they are all on the easy side of simple to make. If you don't want to do the freezer bag, all of them work as single pot meals just as easily.
There are recipies on the site for free, but many of the best ones in my opinion are only in the book.
Dehydrated ingredients wise here's a list of things I use regularly:
pre-cooked pastas (3-10 minute rehydration depending on other ingredients)
salsa (I just dehydrate store bought salsa)
spagetti sauce (I buy a store bought and add spices I like)
Peas (or other veggies for soups)
HashBrowns (use pre-cooked frozen and just dehydrate - works like a charm)
Even though I have a dehydrator and vacuum sealer I sometimes find the store bought ingredients more convenient. For instance I prefer store bought pineapple and apples to my own dehydrated ones. Pasta wise, Ramen noodles are cheaper than my time is worth to pre-cook and then dehydrate angle hair pasta.
In other cases, I prefer freeze dried over dehydrated, which is not possible for home use. I use a lot of freeze dried shredded cheeses or chicken when I can find it reasonably priced. Freeze dried meatballs or hamburger patties are also an option for protiens and offer more of a solid texture since dehydrated ground beef is only shelf stable in dried tiny crumbs.