Salmon with Potatoes and Horseradish Sauce

INGREDIENTS

3 tbsp

canola oil, divided

1 lb

baby red potatoes, cut into 1/4-in.-thick slices

1/2 cup

water

1 tsp

kosher salt, divided

3/4 tsp

black pepper, divided

skin-on salmon fillets (1 in. thick)

1/2 cup

light sour cream

2 tbsp

chopped fresh dill

1 tbsp

creamy prepared horseradish