Directions (Burger):

1. Place chicken in a mixing bowl.

2. Add onion, lemon zest, sour cream, and breadcrumbs.

3. Hand-mix until thoroughly combined.

4. Separate into 6 equal portions and shape into patties.

5. Preheat a grill or flat plate to high.

6. Lightly oil grill or plate.

7. Cook patties 7 minutes each side, turning once.

Directions (Sauce):

1. Place egg yolks, garlic, mustard, and lemon juice in a food processor or blender and process until smooth.

2. With blender still running, add oli in a thin, steady stream; process until mixture achieves a thick consistency.

3. Refrigerate, covered, until required.