food for 5 month old?

I had a visit with a new pediatrician yesterday and she said I can start introducing ALL foods except for honey and shellfish. she also told me peanut butter was safe to give him now.(almost 5 months) I'm so confused! I thought peanuts in any form were a no-no till over a year??? so according to her, keep him on minimal 25oz of formula per day and start introducing everything else. cottage cheese? ricotta cheese? peanut butter? whole milk yogurt? wtf. is it just me or is she retarded?