Place quinoa in Multipurpose Steamer; stir in 1 cup hot water. Microwave on high, uncovered, until tender and water has been absorbed, 12–15 min.
In a bowl, combine mix with 1⁄2 cup hot water. Using the 2-in-1 Citrus Press, squeeze in 3 tbsp juice from lemon. Drain salmon; add to bowl and stir until combined. When cooked, stir in quinoa.
Preheat large fry pan over medium heat.
When hot, add oil; scoop batter onto pan, making four burgers. Lightly press and flatten into shape. Cook until golden brown, 3–5 min per side.
Place kale on bottom of buns. Top each with patty and toppings.