Your main ingredient – the cucumber – is often the culprit. To avoid this, make sure that you choose the right variety: English and Persian cucumbers have very little, or no, bitterness. Also sample a slice before grating and avoid using the ends as this is where the bitter compounds will be most concentrated.

You can find store-bought tzatziki in the deli section of most grocery stores all year long, so you don't have to worry about it being “in season.” However, if you want to make fresh tzatziki, it will taste best when you use cucumbers in peak season.

What is tzatziki? Tzatziki is a salted yogurt and cucumber dip that's made of strained yogurt, shredded cucumber, olive oil, garlic, lemon juice, salt, and herbs. Authentic Greek tzatziki is most often made with sheep or goat yogurt, but my tzatziki recipe calls for regular full-fat Greek yogurt.