In a small bowl, whisk together olive oil, dijon mustard, and white wine vinegar.
Cube the salmon into small pieces and toss in the dressing.
Add diced red onion, capers, parsley, salt, pepper, and lemon juice. Gently stir to combine.
Place tartar tightly in a ramekin and flip to create the shape in the image. Garnish with lemon, parsley, and sea salt.
Serve immediately with crackers, salad, or bread.
Enjoy!