Melt ½ tablespoon butter over medium heat in a large skillet. Add one flour tortilla and layer with 2 ounces of ham (about 2 slices) and ¼ cup shredded cheese. Top with an additional tortilla and lightly press down, cooking for about 2-3 minutes.
Flip the sincronizada and cook for an additional 2-3 minutes until golden brown and crispy. Repeat this process with the remaining ingredients.
Cut each sincronizada into 4 wedges and serve immediately with pico de gallo, guacamole, and sour cream.
Notes
Storage and reheating: Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in a skillet over medium heat until the cheese is melty and the tortillas are crispy again. Avoid the microwave - they'll get soft and soggy.