Smoked Salmon, Walnut and Avocado salad

Name: Smoked Salmon, Walnut and Avocado salad
Prep time: 10 min
Total time: 10 min
Cuisine: American
Ingredients: 200 g leafy greens (-I like rocket and baby spinach, but any kind will do); 1 avocado/s ((large) halved, peeled and cubed); 200 g hot smoked salmon fillet/s; 8 cherry tomatoes (-halved); 60 g walnuts ((½ cup) lightly toasted); 1 red onion/s (-halved and sliced thinly); 4 tbsp capers (-drained); 1 lemon/s (-zest and juice); 60 ml extra virgin olive oil ((¼ cup) extra virgin); 1 tsp horseradish cream; Pinch sea salt; ground black pepper (-to taste)