Thaw the frozen blackberries on a plate in a single layer. Hull the strawberries.
Core the lettuce. Wash and dry the leaves. Arrange them on two serving plates. Peel, stone and slice the avocado and arrange on top of the lettuce with the peeled and sliced kiwifruit, blackberries, halved strawberries and herbs.
Dressing: In a food processor or blender blend: 1/2 ripe avocado,, 3tbsp balsamic vinegar, 1 level tsp honey.
Heat fry pan to medium hot. Sear the beef 1-2 minutes each side - do not overcook. Arrange the beef strips on top of the salad and drizzle the dressing.