I did BLS with both my food allergy LO.
I DID prepare foods for baby. Was very careful to introduce ONE food at a time and then waited several days to see if baby had any reactions before introducing a new food. I kept a detailed diary of all foods we'd tried and any reactions. I was very strategic to introduce foods that would allow me to be able to make dishes for the entire family. Baby was only eating "special" food for a couple of months.
For DCP - I ONLY sent with baby foods that baby had "mastered" at home - food was both safe and something baby could eat well without major gagging. I provided all foods so was in total control of what baby was eating. I let DCP know that baby was VERY good at self-feeding and to please also have baby self-feed at day care. DCP at first thought I was a bit nuts, but was won over once she saw how well abby did at self-feeding. Once my LO were in the toddler room, the teachers were very impressed at self-feeding skills. I smiled and said that was because baby had ALWAYS self-fed.