I've been making these for years and years and years. I use croissant rolls and pizza sauce. Serve with remaining pizza sauce for dipping. The kids loved them when they were little and still ask for them now.
Roasted Cauliflower Soup | Dairy Free Creamy Soup Recipe/ commenter says: I cut up the cauliflower first, then covered in olive oil and salt and roasted about half the time (45 minutes). It gets a great, caramalized flavor when roasted