Place the carrots and daikon in a small bowl and cover with rice vinegar. Let sit for 15 minutes at room temperature.
Combine the mayonnaise and sriracha, stir until smooth.
Cut the sandwich rolls in half horizontally. Spread the top half with the spicy mayonnaise. Spread the bottom half with pate. Place 3 pieces of ham or pork on each sandwich on top of the pate. Top with the cucumber slices, drained carrots and daikon, cilantro leaves and finally the top bun.