Gently toast the sunflower and sesame seeds with the pine nuts in small pan over medium heat.
Combine the shallot, preserves or honey, Dijon, juice and vinegar. Whisk in the extra-virgin olive oil to emulsify and season with salt and pepper.
Combine the lettuce with the tarragon, orange and grapefruit sections, dress with the seeds and dressing just before serving.
Recipe courtesy of Rachael Ray