Mix together the yogurt, cucumber, mint, olive oil, and salt until creamy and fresh. Set aside.
In another bowl, combine the chopped salmon, lemon zest, capers, dill, olive oil, and salt. Right before serving, squeeze in the lemon juice and gently mix.
For the crispy leeks, fry the thinly sliced leek in hot oil until golden and crisp. Drain and set aside.
Spread the yogurt mixture onto a serving plate.
Layer the salmon tartare directly over the yogurt mixture.
Finish with a handful of crispy leeks.
Serve with plantain chips and watch it disappear.