If you want to make a chunky spread, roughly chop half the smoked salmon into pieces. If you want to garnish the dip with a few chunks of smoked salmon, cut a few slivers of smoked salmon for later.
Use a zester or a fine-toothed grater to remove the zest from half a lemon. Juice the lemon to collect 1/4 teaspoon of lemon juice.
In a food processor, blend the sour cream, cream cheese, lemon zest, and peeled garlic clove. If you don't have a blender or food processor, combine by hand until mixed. You will need to use a garlic press to crush the garlic (or skip it) if you are mixing by hand.
Add the smoked salmon and green onion to the cream cheese mixture. Blend until smooth.
If you're making a chunky dip, mix the remaining chopped smoked salmon into the blended salmon spread.
Garnish the salmon spread with the remaining chopped salmon and lemon zest. Serve with the freshly cracked black pepper. Enjoy your salmon dip and spread!