Dice cucumber and tomatoes in large chunks and add to bowl.
Thinly slice the raw red onion and sprinkle over top of cucumber and tomato mixture.
Drizzle oil and vinegar over salad mixture.
Cut a large block of feta and lay overtop individual salads.
Drizzle a little extra oil over feta and sprinkle whole salad with dried oregano.
Garnish with fresh chopped basil.