Use a fork to mash the black beans into a paste.

In a medium bowl, combine the beans, rice, shallot, and 1 tbsp salsa.

Stir together until fully combined.

Divide the mix into two equal balls. Spray a skillet with cooking spray and heat over medium-high heat. Place the two balls in the skillet and flatten into a patty with a spatula.

Cook for 4-5 minutes on each side, until light brown and crispy.

While the burgers cook, combine the Greek yogurt and salsa in a small bowl and toast the buns.

Place the patties on the buns and top with the sauce.