For the salsa, place garlic, vinegar, anchovies, parsley, basil, lemon zest, capers and olive oil in a blender, blitz until combined but still coarse and season with salt and pepper. Store in a sterilised jar until needed.
Chop echalions lengthways into quarters, drizzle with olive oil and cook on a hot barbie until tender and slightly charred.
Trim and lightly oil the asparagus spears and barbecue for 2-3 mins until charred.
Arrange asparagus and echalions on a plate, spoon over salsa and serve.
Recipe by appetite magazine at https://www.appetitemag.co.uk/barbecued-asparagus-with-salsa-verde/