My daughter is 5 now and I can't remember exactly what we gave her at 11 months. But there are two things I'll never forget... We took her to a neighborhood Halloween party - lots of 1-2 year olds. They served PB&J sandwiches, which my daughter loved. So we got a jar of peanut butter and made her a sandwich at home. She started to have an anaphylactic reaction with hives. My husband and I had no idea what was going on because neither of us had been around food allergies before and because she was fine the first time she at peanut butter (apparently the reaction can come on the second exposure).
We called the pediatrician who said to give her Benadryl ASAP and if she didn't recover quickly, rush her to the ER. She has tested highly allergic to peanuts and tree nuts. I read tons of baby materials, but somehow missed the recommendation to wait on introducing the foods that cause the most allergic reactions.... probably because I never in a million years expected my child to be allergic to food.
The other item was hot dogs. We don't eat them, so not something I would have considered, but our pediatrician stressed the importance of not introducing these until kids are much older. He had a toddler choke on one and become permanently handicapped due to lack of oxygen to the brain. I think this is obvious - not to feed young children anything they can't mash, but I thought I'd mention it anyway.
My daughter loves cheese, I do remember giving her Kraft singles and goat cheese (which she still loves). I wish I could remember what else we gave her!