Half a teaspoon of whole grain mustard, 5 twists of salt and pepper, 2 spoons of lemon juice
Thinly slice cherry tomatoes, cucumber, and red onion
Cut black olives and feta cheese into bite-sized pieces
Add all vegetables, olives, and cheese into a large bowl
Drizzle with olive oil, lemon juice, salt, and pepper, then mix well
Serve immediately on a plate