Place the washed spinach in a salad spinner or pat it dry thoroughly with towels until no moisture remains, ensuring the leaves are crisp and dry.
Toast the nuts in a dry pan over medium heat, stirring frequently, until golden and fragrant—about 3 to 5 minutes. Remove and set aside to cool.
Slice the strawberries just before serving, hulled and cut into thin slices to keep their juice and texture vibrant.
In a small bowl, whisk together the olive oil, lemon juice, and a pinch of salt until well combined and slightly emulsified.
Add the sliced strawberries to the spinach, gently tossing to distribute evenly without crushing the berries.
Drizzle the dressing over the salad and toss gently to coat all the leaves and berries evenly.
Sprinkle the crumbled feta cheese and toasted nuts over the top of the salad for added flavor and crunch.
Give the salad a final gentle toss to distribute the toppings, then serve immediately for the freshest texture and flavor.