Watercress and Roast Beef Salad with Creamy Horseradish Dressing

- Watercress

- broccoli florets (I used tenderstem broccoli/broccolini)

- cherry tomatoes (red and yellow, halved)

- spring onions (sliced)

gr- roast beef (cut in strips (I used my own leftover roast beef but deli roast beef could be substituted))

pumpkins seeds (optional)

tbsp- creamy horseradish

tbsp.- white wine vinegar

tsp.- Dijon mustard

tsp.-salt

cup- olive oil

tbsp- Greek yogurt