To make the best tzatziki you really have to strain the yoghurt for 24 hours, or the consistency will be runny and not thick enough.
Roast Garlic: Take an an entire bulb of garlic and cut off the ends (sides). Pour olive oil on it and wrap in aluminum foild. Bake! 350 degrees for 30-35 minutes. - 07 Apr 2012 (Review from Allrecipes USA and Canada)
This is awesome. Made it with fresh Dill instead of the Mint. Next time I will try the more traditional approach and use Goat Yogurt. Update (18 Mar 11): Living in Toronto, we have a massive Greek population and the well known Danforth (Greek Town). Many of my friends are Greek and it was well recommended to use Goat Milk Yogurt (Greek Yogurt). So this time around I made it properly. Strained the Goat Yogurt for 24 hours. The thicker it is the better the outcome. Try it, you won't be sorry. - 23 Aug 2010 (Review from Allrecipes USA and Canada)
This was a most excellent tzatziki! I didn't see any reason to strain the greek yogurt as what I used (Greek Gods brand) was very thick already. However, I did make sure to get as much water as possible out of the cucumber. Also used dill (instead of mint) and 2 regular sized whole garlic bulbs. Texture and weight were perfect! Loved that there wasn't mayo or sour cream in this recipe. It's a keeper....am making more today!! - 25 Feb 2012 (Review from Allrecipes USA and Canada)