Hi Hester! We started at the VERY beginning with some roasted pumpkin, actually! He loved it! The following morning, we all had french toast as a family, but made his with: 2oz formula milk/breast milk, mashed banana (I added some vanilla and cinnamon), then dipped bread in it on both sides and cooked like french toast! When cooked, cut into 4 vertically and let him go for it! He really liked that, too!
From there, literally anything went. Did lots of al dente carrots or broccoli. He loves meat, so gets whatever meat we eat (we don't salt anymore). We're introducing pasta, rice, and noodles - that's quite an adventure! We've also started with a few cheerios on his tray after the yoghurt to practive pincer grip and dealing with smaller things.
HTH!