You know something strange…I’ve never seen an adventure scenario where the heroes are interrupted while they’re eating their iron rations.
Everyone carries trail rations right? It comes standard in most adventuring kits. But I don’t think I’ve ever seen a mod that assumes that the PC eats them.
I’ve seen scenarios where bad guys crash a feast or celebration. Even some while the PCs are hanging about inns or taverns. But I’ve never seen one that features bad guys showing up while the PCs are eating their rations out in the wilderness or dungeon somewhere.