Finely chop the onion, garlic and nettles.
Carefully make a small hole in the centre of the metal lid using a hole punch, nail or similar tool, and carve a wooden peg small enough to insert into it to form a good seal.
Select a piece of hazel wood, straight and about the length of your forearm.
Cross cut the length of green wood to roughly the length of spoon you are looking to create, making it a little longer at first, since this can aid carving.
Wash a new pan or pot in hot water three times, since new cookware often has a protective wax coating that needs removing, using washing up detergent if needed.
Find a safe, sheltered spot in a woodland or similar area to begin your assessment.
Identify a prominent landmark or feature you can see around you.
Take the working end of your line around the tree, keeping tension in the line as you go.
Explore your wild space and look for natural materials that could be lit with a match or a spark.
Before involving children, complete your own thorough risk assessment of the fire area and agree clear boundaries and signals with the group, such as a stop word or a raised hand for silence.