Grab your grated cucumber and squeeze out the excess moisture using a clean kitchen towel or paper towels. This prevents your dip from getting watery and is honestly the most important step nobody talks about. Once it's dry, you're ready to mix everything together.
Combine the squeezed cucumber, Greek yogurt, minced garlic, lemon juice, and olive oil in a medium bowl. Stir everything together until it's smooth and creamy—this takes maybe two minutes total. The dip should come together without any lumps from the garlic.
Add the dried dill, sea salt, and black pepper to the bowl and fold everything together gently. Taste it and adjust the seasonings if you need more lemon or salt—this is your moment to make it perfect. Don't skip the tasting step, trust me on this.
Transfer your homemade tzatziki veggie platter dip to a serving bowl and drizzle with a little extra olive oil on top for that beautiful presentation. Let it chill in the fridge for at least 10 minutes while you prep the veggies (or up to overnight if you're making this ahead).
Wash and cut all your vegetables into bite-sized pieces or sticks that are easy to dip. I arrange mine by color—cherry tomatoes on one side, carrots grouped together, peppers in another section. It literally takes five minutes and makes everything look restaurant-worthy.
Arrange the prepared veggies around the bowl of tzatziki dip on your serving platter. Leave some breathing room between each veggie type so the colors really pop and everything's easy to grab. My trick is arranging the tallest veggies around the outer edge of the platter.
Add the Kalamata olives scattered throughout the veggie arrangement for pops of dark color and salty flavor. Set it out right before guests arrive so everything stays fresh and crisp. Drizzle a little more olive oil over the dip if you want extra polish, then serve immediately.