Cook asparagus in small amount of water until tender. Drain well and shock in ice water. In a food processor, process asparagus and next 5 ingredients until smooth (about 30 seconds). Scrape bowl frequently. Remove from food processor and stir in onion and tomato. Chill thoroughly before serving with tortilla chips, cut vegetables, chicken or seafood.
Recipe courtesy of Charles Maes, Owner of Canby Asparagus