Spring picnic salad

Name: Spring picnic salad
Ingredients: 500g baby potatoes; 150g asparagus spears, trimmed and cut in half; 120g frozen peas; 100g radishes, thinly sliced; 2 spring onions, finely chopped; 10g fresh mint leaves, finely chopped; 10g fresh dill, finely chopped; 1 ripe avocado, chopped; 2 tbsp runny tahini; 1 tbsp extra virgin olive oil; Juice of 1 lemon; 1 tbsp small capers; 1 tbsp caper brine; Pinch of salt; Pepper