Begin by cooking the red lentils according to the package instructions. They should be tender but not mushy, about 15-20 minutes of simmering in water.
While the lentils are cooking, gather all your other ingredients. This will streamline the process and ensure you have everything at hand.
In a food processor, combine the cooked lentils, lemon juice, salt, pepper, minced garlic, and olive oil. Blend until smooth. You may need to stop and scrape down the sides to ensure everything is well mixed.
Once the lentil mixture is smooth, add the sunflower seeds, diced celery, red onion, minced tarragon, and parsley. Pulse a few times until the ingredients are just combined, ensuring you maintain some texture.
Taste your dip and adjust the seasoning if necessary. You can add more salt, pepper, or lemon juice according to your preference.
Transfer the Sunflower Lentil Dip to a serving bowl and refrigerate for at least 30 minutes to allow the flavors to meld together. Serve with your choice of dippers, such as fresh vegetables, crackers, or pita bread.