Drop the Broccolini® into a saucepan of boiling salted water, cook for 1 minute. Drain and refresh under cold water. Drain well, pat dry. If required cut the stem in half lengthways so you have 12 pieces. Wrap each Broccolini® stem in a prosciutto piece.
To make the dressing; combine all the ingredients in a screw-top jar, season and shake well to combine.
Preheat a chargrill pan or barbecue grill on high. Brush both sides of the bread with oil and chargrill for 2 minutes each side until lightly charred. Chargrill Broccolini®, in batches if necessary, for 3-4 minutes, turning until prosciutto is lightly charred.
Spread the sourdough with goats cheese. Top with Broccolini®, spoon over dressing and serve.