Rinse the fresh dill and the lettuce leaves. Prepare a large bawl for the salad. Start chopping the dill, cut the salad leaves in stripes and season with salt and pepper.
Open the tuna can and scrape it out over the lettuce. Add the lemon juice and gently toss everything together. Serve immediately with warm croutons for more consistency. Enjoy this healthy tuna salad as a quick lunch or light dinner.