MindMeld is a microstructure still in development, which means it’s not yet part of the 33 in the LS menu, but it is a promising one in the works. MindMeld is a combination of forming Mindmaps by using the structure What, So What, Now What? (W3). Saskia Vermeer-Ooms has used W3 several times and she thinks it is a powerful structure to use when you need your audience to come up with concrete actions of a certain challenge. You do this by first taking two other steps in which you take the time to observe the data available before drawing conclusions and moving into action mode.
Read about her experience with MindMeld in this post: https://www.linkedin.com/pulse/trying-out-mindmeld-liberating-structure-saskia-vermeer-ooms/