Greek Avocado Toast

Original recipe found here.
2 avocados
1/2 a lemon
kosher salt
Freshly ground black pepper
pinch of crushed red pepper flakes
4 slices sourdough bread, toasted
1/2 cup crumbled feta
1/2 cup halved cherry tomatoes
1/2 cucumber, chopped
1/2 cup chopped kalamata olives
1/4 cup chopped dill
Extra-virgin olive oil, for drizzling (optional)
Remove avocado halves from skin and place in a medium bowl. Immediately squeeze some lemon juice over the avocado. Season avocado with salt and pepper and mash with a fork. Taste for seasoning, adding more lemon juice if desired
Spread mashed avocado onto toast then top with feta, cherry tomatoes, cucumber, kalamata olives, and dill. Drizzle with olive oil and serve.