01 - Prepare the bread slices using a toaster or grill pan until they are golden brown and crisp.
02 - While the bread is toasting, halve, pit, and peel the avocado. In a small mixing bowl, mash the avocado with lemon juice, sea salt, and black pepper until it reaches a mostly smooth consistency with some discernible texture.
03 - Evenly distribute the mashed avocado mixture over the surface of each toasted bread slice.
04 - Generously sprinkle the crumbled feta cheese atop the avocado layer on each toast.
05 - Drizzle each assembled toast with extra-virgin olive oil and sprinkle with chili flakes according to your desired level of heat. Garnish with fresh herbs if using. Serve immediately.