Steps
1. Toast the whole grain bread until golden brown.
2. In a small bowl, mash the avocado with lemon juice, salt, and pepper.
3. Heat olive oil in a pan over medium heat and sauté spinach until just wilted, about 1 minute.
4. Spread the mashed avocado evenly over the toasted bread.
5. Top with sautéed spinach and sprinkle crumbled feta cheese if using.
6. Serve immediately and enjoy your healthy breakfast.