2. Step
Combine salmon, breadcrumbs, scallion, egg, yogurt and garlic in a large bowl; stir, breaking up the salmon, until well mixed. With clean hands, roll about 1 1/2 tablespoons of the mixture into a ball; place on the prepared baking sheet. Repeat with the remaining mixture, making 18 to 20 salmon balls. Lightly coat the balls with cooking spray. Bake, flipping once, until firm and golden, about 20 minutes.