01 - Toast the bread slices in a toaster or on a dry skillet over medium heat until golden brown and crisp on both sides.
02 - Halve and pit the avocado. Scoop the flesh into a small bowl and mash with a fork until creamy. Season with sea salt, cracked black pepper, and a squeeze of fresh lemon or lime juice if desired.
03 - Divide the mashed avocado evenly and spread a generous layer over each slice of toasted bread.
04 - Top each slice with the drained, chopped kimchi, distributing it evenly across the surface.
05 - Drizzle with olive oil if using, then sprinkle with toasted sesame seeds, chopped cilantro, and red pepper flakes. Serve immediately while the toast is still warm and crisp.