In a mixing bowl, toss the lettuce, cherry tomatoes, cucumber, spring onions, avocado, olive oil and half of the lime juice in a mixing bowl and set aside.
To make the Jalapeño Mayo dressing, mix the mayonnaise, fish spice, chopped coriander and lime juice together.
To assemble the jars. Place the mixed salad in mason jars, top with salmon and place generous dollop of dressing and garnish with micro herbs.