*16 bamboo skewers soaked in water 1 hour.
*Prepare grill for medium heat. Mix oregano, sesame seeds, cumin, salt, and red pepper flakes in a small bowl to combine; set spice mixture aside.
*Beginning and ending with salmon, thread salmon and folded lemon slices onto 8 pairs of parallel skewers to make 8 kebabs total. Brush with oil and season with reserved spice mixture.
*Grill, turning occasionally, until fish is opaque throughout, 5–8 minutes.
Buy already-skinned salmon!