Step Families Support Group
Traditionally, a stepfamily is the family one acquires when a parent enters a new marriage, whether the parent was widowed or divorced. This community is focused on many of the relationships and issues that may arise within stepfamilies where you may find answers from some members and you may help other members with their questions.
I would say, don't take this personally. It's not really a big deal if they like what you cook for them already.
Choose your battles.
Hugs.
Maybe he meant that he wasn't sure if his boys would like the recipe (are they picky eaters?) and he wanted to know if your kids liked it.
I would let this one go for now, but if you ntice a pattern of things being "good enough" for your kids and then the same things not being good enough for his, speak up.