Hi K., I made our children's food and pureed them and put them in ice cube trays. I would do it on the weekend usually and do 2 veggies/fruits a day or more, depending on the time.
I would buy fresh or fresh frozen and cook them and puree them with a simple hand mixer I had in the pot. I reserved some of the liquid in a separate bowl, just in case I needed to add more to it. I bought peas, green beans, butternut squash (which was expensive sometimes at 1.98 a pound, but it lasted a while), sweet potatoes, broccoli, carrots, etc. You can use some of your left over veggies and puree them (and as they get older, cook them, but chop in chunks/bits instead and still put them in an ice cube tray) like mashed potatoes or corn. You can add some rice to their veggies too.
Fruits, I just bought some unsweetened (which is all we buy anyway) applesauce and then you can get some canned fruits in it's own juice and puree them or do that with some fresh fruits that is easily pureed and no need to cook. You could make your own applesauce, but I never bothered with it..I have friends that did for storage for the whole family.
Just spoon or pour the items in the ice cube trays (I'd get at least 6 trays) and if you do this in the morning, it should be ready enough by afternoon or evening to put into gallon size ziploc bags. Label them if you need to. When you take them out, just take a couple of cubes out (or however many he'll need) and put in the microwave (if you use one) and would be done in a minute or less..depending on how many cubes you have.
I have found that I needed to add more water back to the peas, they are very thick. Carrots and Green beans, I've NEVER needed to add water back to those two. They are both the same consistency pretty much. Butternut squash, I just cut in half lengthwise and put face down in a cookie sheet in about an inch or less of water and just left it there a while. When your fork can go through it easily, it's done. Just scoop out...it's nearly puree already, so it doesn't take a second to mix it up. This is the most simple one to make because you don't have to stand over a stove. And even if you forget about it in the oven (whihc I've done many many times), it's no big deal, it's fine.
If you have some avocado, that too is easy to feed the baby. That is the first food that I give. Plus, I like the leftovers for guacamole. LOL
And you can do your own oatmeal. Just blend up some dry oats and add some milk and warm it up. Or just make some oatmeal as he get's older and is able to handle it.
Good luck! It's fun to feed them yourself. You'll have quite a collection of fruits and veggies in the freezer. (Oh, I typically bought 2 bags of frozen veggies of one kind and cooked both bags...that way I didn't feel like I was cooking all the time) But for starters, you may want to do one bag of each kind, until he is ready to really eat. You've got about 5 months, so I'd look for some sales on those items. (Oh, i had gotten butternut squash from Publix before in a frozen box...of course it's already pureed..don't know if they still have that.
Mother of 4