Thinly slice the cucumber and rinse the raspberries.
Place them in a salad bowl with the arugula or lamb's lettuce.
Add the crumbled feta.
Prepare the vinaigrette by mixing the vinegar, oils, and a few twists of the pepper mill.
Drizzle the vinaigrette over the salad just before serving.
Optionally, sprinkle with sesame seeds.
Enjoy!