Instant Pot Mashed Potatoes with Parmesan and Herbs

INGREDIENTS

2 1/2 tsp

kosher salt, divided

2 1/2 lb

Yukon Gold potatoes, peeled and cut into 1-inch chunks

1 cup

2% Greek yogurt, at room temperature

2 tbsp

unsalted butter, at room temperature

1/2 tsp

ground black pepper

3 tbsp

finely chopped fresh chives

1/2 tbsp

chopped fresh thyme

1/4

cup freshly grated Parmesan cheese, plus additional to taste