To make the salad dressing: puree the strawberries with the the olive oil, lemon juice and vanilla extract in the food processor. Transfer to the salad bowl and whisk in the honey, lemon zest and poppy seeds. Season with the sea salt, pepper and paprika.
Add the spinach and sliced strawberries on top of the dressing and give it a gentle toss to coat just before serving.
Serve sprinkled with the walnuts and goat cheese on top.