Make a quick sauce. In a small bowl, stir together Greek yogurt, Dijon, lemon or lime juice, a pinch of salt, and black pepper. Add a splash of olive oil if you want it silkier.
Taste and adjust acidity or salt.
Season the chicken. Toss the sliced or shredded chicken with a sprinkle of salt, pepper, and smoked paprika or chili powder if you like a bit of warmth. If the chicken is cold, warm it in a skillet for 2–3 minutes for better texture.
Prep the avocado. Slice or lightly mash the avocado with a pinch of salt and a squeeze of lemon or lime to keep it bright and green.
Warm the tortillas. Heat each tortilla in a dry skillet over medium heat for 15–20 seconds per side. This makes them more pliable and helps prevent tearing.
Assemble. Spread the yogurt sauce over each tortilla, leaving about 1 inch at the edges.
Layer greens, avocado, chicken, tomatoes, cucumber, and onion. Add herbs if using.
Wrap it up. Fold the sides in, then roll tightly from the bottom up. If you’re packing to go, wrap in parchment or foil for structure.
Toast (optional). For a warmed, slightly crisp wrap, place the rolled wrap seam-side down in a skillet over medium heat for 1–2 minutes per side.
Slice and serve. Cut in half on the diagonal.
Add extra lemon, hot sauce, or a sprinkle of flaky salt if you like.