Make the tuna filling: In a bowl, mix tuna, Greek yogurt or mayo, lemon juice, red onion, herbs, and a pinch of salt and pepper. Taste and adjust lemon or salt.
It should be bright and creamy.
Prep the avocados: Halve the avocados and remove pits. Scoop out a little extra flesh to create a bigger well, roughly chop it, and stir it into the tuna mixture.
Stuff the avocados: Spoon the tuna mixture into the avocado halves. Finish with a crack of pepper and a squeeze of lemon.
Toss the salad: In a large bowl, combine cucumber, tomatoes, and red onion.
Drizzle with olive oil and vinegar or lemon juice. Add oregano, salt, and pepper. Toss gently.
Fold in feta if using.
Season the chickpeas: In a medium bowl, combine chickpeas, olive oil, paprika, cumin, garlic powder, salt, and pepper. Stir to coat well.
Warm the pitas (optional): If you want them soft and toasty, heat a dry skillet over medium for 1–2 minutes per side, or microwave for 15–20 seconds wrapped in a towel. No oven needed.
Make the yogurt sauce: Stir Greek yogurt with lemon zest, lemon juice, chopped herbs, and a pinch of salt.
Thin with a teaspoon of water if you want a drizzle.
Assemble the pitas: Spread a spoonful of yogurt sauce inside each pita. Add a few chickpeas and any extras like greens or olives. Drizzle more sauce on top.
Plate and serve: Arrange tuna-stuffed avocados, a heap of cucumber-tomato salad, and chickpea pitas on a platter.
Add lemon wedges and hot sauce on the side.