Peel and cut your avocado. Peel your fava beans if they aren't already. Gather all your ingredients.
Saute the fava beans in a light olive oil over high heat to accentuate the color. Do not overcook. But, make them soft enough to puree.
Bring the Vegan milk, agave, and lemongrass to a simmer. Whisk in the agar agar and allow to thicken. Remove from heat and move onto the next steps.
In a good blender, blend the beans until smooth. Add in the avocado, herbs, lime juice, and a little avocado oil. Blend until a fine puree. Add in the vegan milk steeped with avocado. Blend until smooth. Transfer the mousse to molds. Refrigerate for at least an hour until they hold their shape.
Serve in the dishes or unmold onto a salad of microgreens, herbs, and vegetables with lemon juice, avocado oil, salt and pepper as a dressing.