Grate your cucumber directly onto a clean kitchen towel or cheesecloth. Really squeeze out all that moisture—this prevents a watery dip situation. Measure out about 1 cup of grated cucumber after draining. This step takes maybe 3 minutes but makes a huge difference in your final result.
Add the drained cucumber to a medium bowl with 1 cup of Greek yogurt. Mix in your 2 minced garlic cloves and stir everything together thoroughly. The garlic should be evenly distributed throughout. I like to use a fork to break up any clumps of yogurt.
Pour in 1 tablespoon of extra-virgin olive oil and 1 tablespoon of fresh lemon juice. Sprinkle 1 teaspoon of dried dill over the top along with ½ teaspoon salt and ½ teaspoon black pepper. Taste it and adjust seasoning as needed—sometimes I add a tiny bit more lemon if it needs brightness.
Transfer your homemade tzatziki veggie platter dip to a serving bowl and give it a final stir. You want it creamy and smooth, not lumpy. Let it chill in the fridge while you prep the vegetables (at least 15 minutes helps flavors blend).
Prep all your raw vegetables around this time. Halve 1 cup of cherry tomatoes and slice 1 large red bell pepper into strips. Julienne 2 carrots and pit and halve ½ cup of Kalamata olives. Having everything prepped before assembly makes plating so much faster.
Arrange your veggies on a large wooden board or platter around the tzatziki bowl. Start with the heartier vegetables like carrots and peppers around the edges. Scatter the cherry tomatoes and olives in clusters for visual appeal.
Cut 4 whole-wheat pita breads into wedges and tuck them around the platter. Set everything out 10 minutes before serving so the dip warms up slightly. This makes the flavors even more pronounced and the veggies taste fresher.