Add all the prepared greens in a bowl and mix well.
In a small bowl, add the smashed garlic then the lemon juice. Mix. Then, add the sumac, mint and salt. Mix.
At the end add the olive oil and mix it all well.
Pour the dressing over the greens and using tongs mix the salad till everything is distributed well.
Notes
The salad is delicious right away, but I recommend letting it sit in the fridge for half an hour so all the flavors come together.This tastes great even a few days later, so I always make extra!The salad is extra oniony and garlicky, if you have an issue with too much of either, halve the amount of garlic or onion.