Mix the dressing ingredients together.

Cut the cucumber into half slices.

Peel the mandarins and separate the segments.

Divide the spinach between a large bowl or 2 smaller bowls.

Drain the beetroot.

Distribute the beetroot, cucumber, and mandarins through the spinach.

Drizzle with the dressing.

Finally, garnish the salad with the feta and toasted pine nuts.