Skin salmon. Chop into small bits. Stir salmon pieces, panko, egg, yogurt, cilantro, mustard, lemon juice, salt, and pepper in a medium bowl.
Heat oil in a large skillet. Form salmon mixture into 2 inch balls. Place several balls in hot skillet, and flatten with the back of a spatula. Let cook 2-3 minutes per side or until golden. Repeat until all salmon has been used (we made 14 patties).
Place cooked salmon patties on buns and top with salsa.
Avocado Salsa
Combine all ingredients in a small mixing bowl.
Slider Buns
Preheat oven to 425. Combine all ingredients in a blender. Blend and pour into greased cupcake molds (silicone work great!). Bake at 425 for 15-20 minutes or until set. (Tops will appear wet, so don't use the appearance as your guide. Buns are done when a toothpick inserted in the center comes out clean.)
Notes
Note: we increased the baking powder in the buns to 1 teaspoon to give them a little more height.NOTE: To make this meal fully keto (and paleo), use almond meal or almond flour in place of the panko.