Preheat the air fryer: Set it to 375°F (190°C). Preheating helps the tortillas crisp quickly and evenly.

Make a heart template (optional but helpful): Fold a sheet of parchment in half and cut a half-heart shape. Unfold to reveal a symmetrical heart. Match it to your tortilla size.

Cut the tortillas: Place the template on a tortilla and trim around it with kitchen shears or a sharp knife. Repeat for the second tortilla so both hearts are the same size.

Assemble: Lay one tortilla heart on a cutting board. Sprinkle an even layer of cheese, leaving a small border around the edge. Add optional fillings sparingly so the quesadilla seals well. Top with cilantro and a pinch of salt and pepper.

Seal the edges: Place the second tortilla heart on top. Gently press around the edges. For a tighter seal, lightly brush the border with water or a thin smear of refried beans before pressing.

Brush or spray: Lightly brush the top with butter or oil for color and flavor. Spray the air fryer basket or place a perforated parchment liner inside and spray it.

Air fry: Place the quesadilla in the basket. Cook for 3–4 minutes, then carefully flip using tongs or a spatula. Cook another 2–3 minutes until golden and the cheese is melted.

Rest and slice: Let it rest for 1–2 minutes to set the cheese. Slice into wedges or serve whole for full heart effect.

Serve: Plate with salsa, guac, and sour cream. Add a sprinkle of chopped cilantro or green onion for color.