Squeeze lemon juice into avocado half (I do less than 1/2 a lemon), and then top with olive oil (approx. double the quantity of lemon juice). Add a pinch of smoked paprika and salt and pepper, to taste.
Method 2:
Pour vinegar into avocado half (I fill less than half the hole). Top with olive oil (approx. double the quantity of vinegar). Add salt & pepper to taste.
Method 3:
Mix everything together except for the olives. Add yogurt mixture to avocado and then top with the olives.
Method 4:
Mix ingredients together except for spring onion and then pour into halved avocado. Top with spring onion.