Little gem with orange, pecans and parmesan

Ingrediënten

• 60ml cold-pressed rapeseed (or olive) oil
• 1 tbsp english mustard
• 1 tbsp cider or sherry vinegar
• 1½ tbsp orange marmalade
• 1 orange, 1½ tsp finely grated zest, 1½ tbsp juice
• 50g roasted salted pecans, roughly chopped
• 35g parmesan, roughly crumbled
• 5g tarragon leaves
• Fine sea salt and black pepper