Thinly slice leeks and coat them in olive oil in a cold pan. Heat on high for 2 minutes, then lower to medium-low and fry until golden (3–4 minutes). Avoid burning.
Combine cilantro, yuzu, scallions, serrano, ginger, agave, miso, coconut milk, tamari, fish sauce, and sesame oil in a blender. Pulse for 30 seconds.
Slice the salmon thinly using a sharp knife.
Strain the prepared sauce onto a serving plate.
Arrange the salmon slices over the sauce and top with lemon zest, flaky salt, fried leeks, cilantro flowers, and leaves.
Finish with a drizzle of salsa macha around the edges for a bold, spicy kick.