01 - Heat chili oil in a large nonstick skillet over medium-high heat until shimmering and fragrant.
02 - Crack the eggs into the skillet. Cook for 2-3 minutes until the whites are set and edges are crispy, basting the tops lightly with hot oil. Season with salt and pepper. Reduce heat if needed to prevent burning.
03 - While the eggs cook, heat olive oil in a separate pan over medium heat. Add garlic and sauté for 30 seconds until fragrant but not browned.
04 - Add spinach to the garlic, tossing until just wilted, about 2-3 minutes. Season with salt and optional red pepper flakes. Remove from heat.
05 - Place toasted bread on plates. Top each with half of the garlicky spinach.
06 - Carefully place two chili oil eggs on each serving, spooning extra chili oil from the pan over the eggs if desired.
07 - Garnish with chopped scallions or chives. Serve immediately.