Mix the creamy base. In a medium bowl, combine mayonnaise and Greek yogurt. Stir until smooth.
Add the flavor. Mix in chopped olives, lemon juice, Dijon mustard, garlic powder, and black pepper. Stir well to combine.
Optional spice. Add smoked paprika or chili flakes for a hint of heat and smokiness.
Taste & adjust. Give it a quick taste. Want it tangier? Add more lemon juice. Need more olive punch? Toss in a few extra chopped olives.
Chill & serve. Cover and refrigerate for at least 15 minutes to let flavors meld. Spread generously on burgers, sandwiches, or use as a dipping sauce.