My third is 10 months old. I started him on solids at 7 1/2 months---before that he was exclusively breastfed.
My doctor has always recommended that I just take what we eat and mash it up---salt, pepper, butter and all. I mostly eat sushi or other food not approprate for babies, so that concept does not work with me.
Here is my boys diet in order of introduction, hope it helps.
Yam, sweet potato, spinach, banana (binding), pear (loosing), squash, beets, mango, old fashioned Scottish oatmeal cooked with apple and whole milk, avocado (he loves it mixed with cooked egg yolk), beets, pumpkin, onion, mushroom, peaches, plums, Greek yogurt, edamame, kiwi, green beans, peas.
I think you get the point. I make everything myself---just steam it and mash it with a fork or use a potato masher. Good luck,