Pulse: Place ½ cup kalamata olives, 1 teaspoon extra virgin olive oil, ½ teaspoon fresh lemon juice, and a pinch kosher salt in a food processor. Pulse a few times - ensure olives are still chunky and not pureed at all.
Combine: Mix olive mixture with diced tomatoes, ½ cup feta cheese and 1 tablespoon garlic and gently fold together. Add additional olive oil and/or salt to taste.