Steps
1. Boil the potato until tender, then let it cool and chop into cubes.
2. Grill or bake the chicken breast until cooked through, then slice it.
3. Hard boil the egg, peel, and dice it.
4. In a bowl, mash the avocado and mix with a squeeze of lemon juice.
5. Add the chopped potato, sliced chicken, diced egg, and spinach to the bowl.
6. Gently toss everything together until well combined.
7. Serve the salad chilled.