In a small saucepan, heat cream and salt over medium heat just until bubbles form around edges of pan (do not boil). Remove from heat and add lavender; cover and let steep for 10 minutes.
Strain through a fine-mesh sieve into a small bowl, pressing down on leaves to extract as much liquid as possible, discarding solids. (Cream should still be warm to the touch.)
Pour warm cream over chocolate; let stand for 30 seconds. Starting in center of bowl, slowly stir with a rubber spatula until well combined. Use immediately.
Recipe by Victoria at https://victoriamag.com/chocolate-bergamot-layer-cake/