While on the ground.
Jessy gathered three medium-size rocks, then she put dried woods and leaves in the middle of the rock, she pulled out the matchbox from the bag, took one stick and ignited it producing fire, she burned the dried leaves and soon enough the flames were starting to devour the dried woods. The fire becomes steady and looking good for boiling water, she placed the pot above the rocks.
While waiting for the water to boil, she surveyed the surrounding area, there are lots of dried woods and leaves littering on the ground. Cooking foods will never be a problem for Jagger considering the abundance of woods in the forest.
"This is fun!" she said to herself. She'd never done this before, boiling water in the ground using rocks and woods, because Nana Aida was always been the one who boils water in the gas stove back in the mansion. It's a new experience for her and she finds it entertaining.