- In a large bowl, whisk together yogurt, mayonnaise, 1 Tbs. lemon juice, salt, and herb of choice until well combined. Gently stir in green onions and crabmeat until evenly coated.
- Sprinkle extra lemon juice on avocado halves, and lightly coat using your fingers. (Lemon juice will slow the browning of the avocado flesh.)
- Mound crab salad evenly onto avocado halves to serve.