01 - Toast bread slices to desired level of crispness using a toaster or grill pan
02 - While bread toasts, halve and pit the avocado. Scoop flesh into a bowl and mash with lemon juice, chopped herbs, salt, and pepper until creamy but still slightly chunky
03 - For fried eggs: heat a nonstick skillet over medium heat, lightly oil if desired, and fry eggs to preferred doneness (sunny side up or over easy, about 3-4 minutes). For poached eggs: bring water to gentle simmer, add splash of vinegar, and poach eggs for 3-4 minutes until whites are set
04 - Spread mashed avocado mixture evenly over toasted bread slices
05 - Place one cooked egg on top of each avocado-covered toast slice
06 - Drizzle with olive oil, sprinkle with feta cheese if using, add red pepper flakes, and garnish with microgreens or additional fresh herbs
07 - Serve immediately while toast is warm and crispy