An allergen change during a busy service

A kitchen uses a standard recipe and supplier ingredient record for a prepared sauce. During a busy service a substitute product arrives, and its label contains an allergenic ingredient absent from the previous product. Staff have already prepared part of the meal and used shared utensils. One employee suggests keeping the old menu information because the product looks and tastes similar. Another wants to rely entirely on the usual cooking step. The team must identify affected portions and handling pathways, review the actual ingredient information and use the responsible food-safety communication process. The vignette supplies no local statutory allergen list or mandated temperature and does not assume that cooking removes the allergen. It asks how a sound operational system responds to a material change.