Roasted Salmon with Dill, Capers, and Horseradish

INGREDIENTS

1/4 cup

heavy whipping cream

1 1/2 tsp

buttermilk

1 tsp

white wine vinegar

2 tbsp

chopped fresh dill

1 1/8 tsp

kosher salt, divided

1 1/8 tsp

freshly ground black pepper, divided

1/4 cup

finely grated fresh horseradish

2 tbsp

chopped fresh flat-leaf parsley

2 tbsp

finely chopped shallots

3 tbsp

capers, drained and chopped

3 tbsp

olive oil

salmon fillet