First off, prepare to cook the spinach by heating the olive oil in a saucepan. Saute the garlic for a minute and then add the spinach and allow to cook until wilted, for about 5 minutes.
Drizzle with lemon juice and season. Leave to cool. Set over a strainer to drain. Once cooled, chop the spinach up. Prep the rest of the ingredients.
Next, simply combine the cooled down spinach with the grated zucchini, yogurt, herbs, lemon juice, olive oil and seasoning.
Serve with toasted pita bread. Keeps in the refriderator for up to one week.