Greek food sings of the summer — it’s best enjoyed outside, from mainland mountaintops to island beaches. Mezze spreads celebrate punchy purple olives, garlicky dips and herb-sprinkled cheese, while salads of sun-ripened tomatoes, tangy feta and fragrant oregano are perfect with just-landed grilled fish or slow-stewed legumes cooked in outdoor ovens following recipes that date back to antiquity. From Macedonia in the north to Crete in the south, we explore the country via its standout dishes