Evergreen trees are pillars of the winter; through extreme temperatures across the most bitter terrains, they stand tall in the face of adversity. However, as the festive season draws to a close, these comforting conifers can often be found lining the streets, cast off and disused. These decorations are also the unsung edible heroes of our forests, and this creative guide explains how to make pine, fir, and spruce into feast foods, preserves, desserts, and drinks.