Re: baby ate potato!
No beatings from me. I don't think it's that big a deal, really. If your lo enjoyed it and didn't have any probs with rashes or tummy ache later, it's probably fine. I know my lo got "tastes" of things long before I officially 'started solids' and she never had any negative reactions. It's good to watch carefully afterward, just in case, and be careful about introducing more than one thing at a time.
My lo always nursed right after eating in the beginning, I assumed it was cause she was thirsty. You might try offering breastmilk after solids to 'wash it down' rather than water. I started giving water with her meals when she was eating regular meals 3x/day rather than just tasting off our plates- probably around 9-10 months.
“We are not put on earth for ourselves, but are placed here for each other. If you are there always for others, then in time of need, someone will be there for you.”