In a blender or food processor, combine the ripe avocados, lime juice, fresh herbs, and Greek yogurt or sour cream. Season with salt and pepper. Blend on high for 1–2 minutes until smooth and creamy.

Transfer the avocado mousse into an airtight container. Press plastic wrap against the surface to prevent browning. Refrigerate for a minimum of 1 hour.

Remove the mousse from the refrigerator. Spoon portions into serving glasses or onto a platter. Create a well in each portion to place smoked salmon.

Garnish with additional herbs or lime zest for enhanced flavor and presentation.