Drain and rinse the canned chickpeas thoroughly under cold water to remove excess sodium and starch, which helps them maintain their texture when mashed. While the chickpeas drain, finely dice the bell pepper into 1/4-inch pieces, chop the sun-dried tomatoes, mince the dates, slice the green onions, chop the olives, and roughly chop the parsley and mint. Having all ingredients prepped and ready ensures the salad comes together quickly and flavors distribute evenly throughout.

Transfer the drained chickpeas to a large mixing bowl and mash them with a fork or potato masher until mostly crushed—I like to leave some texture rather than creating a completely smooth paste, as this gives the sandwich better structure and mouthfeel. In a small bowl, combine all dry spices (oregano, coriander, cumin, onion powder, black pepper, za'atar, and smoked paprika) with the salt and mix well to distribute them evenly, which prevents any single spice from being too concentrated in one bite.

Whisk together the tahini, lemon juice, and 2 tablespoons hot water in a separate bowl, stirring constantly until the mixture becomes light, creamy, and pourable—this emulsification is key to distributing the tahini evenly throughout the salad rather than having it clump. The hot water helps thin the tahini to the right consistency while the lemon juice adds acidity that brightens all the Mediterranean flavors.

Add the dry spice mixture from Step 2 to the mashed chickpeas and stir to coat evenly. Pour in the tahini dressing from Step 3 and fold everything together gently. Now fold in the prepped vegetables and herbs (bell pepper, green onions, sun-dried tomatoes, olives, dates, parsley, and mint) until well distributed, being careful not to over-mix, which can break down the vegetables and muddy the flavors. Taste and adjust seasoning as needed—add more lemon juice for brightness, more salt for depth, or a splash of water if the mixture feels too thick.

Toast the bread slices lightly if desired for structure and to prevent sogginess, then spread or layer the chickpea salad onto each slice. Top with crispy greens for freshness and slight bitterness that balances the rich tahini and warm spices. Serve immediately while the bread is still warm and the greens are crisp.