Combine ground pork and ground beef in a bowl.

Gently fold in beaten egg white.

Add bread crumbs, minced onion, minced garlic, sesame oil, salt, pepper, red pepper flakes, cilantro, and brown sugar to the meat mixture.

Divide the meat mixture into four even portions.

Grill or BBQ the burgers for approximately 6 minutes on each side, or until cooked through.

While the burgers are grilling, prepare the peanut butter mayo.

In a separate bowl, mix mayonnaise with peanut butter, lime juice, and lime zest until well combined.

Toast the whole wheat buns.

Spread the peanut butter mayo on both sides of the toasted buns.

Divide shredded carrots and shredded lettuce evenly between the four buns.

Add a thick slice of tomato to each bun.

Top the tomato with a grilled burger.

Serve immediately.