Toast the whole grain bread slices until golden brown and firm.

Heat olive oil in a small non-stick skillet over medium heat.

Crack eggs into the skillet and cook until whites are set and yolks are cooked to desired level of doneness.

Spread one tablespoon of hummus evenly across each slice of toasted bread.

Layer baby spinach, tomato slices, and sliced kalamata olives on the bottom slice of bread.

Place the cooked eggs directly on top of the vegetables.

Sprinkle crumbled feta cheese, dried oregano, salt, and black pepper over the eggs.

Close the sandwich with the remaining slice of bread and slice diagonally before serving.