Step 1

Put the potatoes in the bottom of an Instant Pot. Add 1 cup water, 2 tablespoons of the butter, 1/2 teaspoon salt and a few grinds of pepper. Place the pot's steam rack over the potatoes.

Step 2

Rub the top and sides of the salmon fillets with the paprika and lemon zest and season generously with salt and pepper. Place skin-side down on the rack. Put on the lid, making sure the steam valve is in the sealing position, and set the cooker to high pressure for 3 minutes. When finished, carefully turn the steam valve to the venting position to release the pressure.

Step 3

Remove the salmon and rack and set the cooker to saute at normal heat. When the potatoes start sizzling, add the garlic and cook, stirring, until softened, 1 to 2 minutes; stir in the remaining 2 tablespoons butter and season generously with salt and pepper. Smash the potatoes with a fork or wooden spoon until chunky.

Step 4

Turn off the cooker. Add the mixed greens to the potatoes and stir until wilted, 1 to 2 minutes. Season with salt and pepper. Divide the salmon and potato mixture among plates. Serve with lemon wedges.