When the kitchen is missing your favourite tool
A missing favourite utensil does not have to spoil dinner. Change the method before you try an unsafe substitute.

Look once, then simplify
Check the obvious cupboards and the cottage information before deciding an item is absent. Some kitchens store baking trays or larger pans away from everyday utensils. If the listing specifically promised something important and you cannot find it, ask the manager.
Then look at what the meal actually requires. Vegetables intended for precise slicing may work in larger pieces. A sauce can be served separately instead of blended. A meal planned for several pans might become one main dish with bread or a simple side.
Keep substitutions within the proper use of the equipment. Do not put a pan in the oven unless it is suitable, use glassware as an improvised cooking vessel, or balance a heavy container over an unsuitable heat source.
Let the ingredients lead
Choose a method that suits the available hob, oven and pans. If the roasting tray is too small, cook a smaller amount at a time or change the menu rather than crowding it beyond usefulness. If there is no colander, a different meal may be easier than trying to drain a heavy pan awkwardly.
A basic knife, board and saucepan can support plenty of straightforward food. The aim is dinner, not reproducing the exact technique you use at home. Keep preparation manageable and follow normal food-safety guidance.
For a special recipe requiring a particular tool, either confirm it before travelling or bring your own suitable item.
Leave the kitchen intact
Do not search locked cupboards or borrow equipment from another cottage without permission. Avoid using decorative objects as kitchen tools simply because they are nearby.
If you buy an inexpensive utensil during the stay, take it with you unless the owner agrees otherwise. Unexpected additions can complicate inventories and may not be suitable for future guests.
A small change to the meal is usually easier than turning the holiday kitchen into a problem-solving contest. Save the elaborate version for a kitchen whose equipment you know.