Mix yogurt and basil. Divide into 4 bowls or resealable containers (if packing to go).
Toss together cucumbers, tomatoes, oil, lemon zest, lemon juice, oregano, mint, garlic, if using, and salt. Divide on top of yogurt. Sprinkle with feta and pepper, if using.
Add chopped veggies such as avocado, zucchini, carrot, cooked beet or broccoli.
For heartier servings, cooked quinoa or nuts and seeds such as walnuts, almonds, pine nuts or pumpkin seeds.