Coat a stove-top griddle with cooking spray and set over medium-high heat to preheat.
In a large bowl, combine rice, pork, beans, arugula, cheese, and tomatoes. Mix well to combine.
Arrange tortillas on a flat surface. Top 1 side of the tortillas with pork mixture. Fold the other side over to cover filling. Transfer quesadillas to hot pan and cook 2 to 3 minutes per side, until golden brown and cheese melts. Serve with orange salsa.
Combine all ingredients in a medium bowl and toss to combine.