Step 1

In a large saucepan or dutch oven, combine the potatoes, salt, and enough cold water to cover the potatoes by 1 inch.

Step 2

Bring the water to a boil, then reduce the heat to low.

Step 3

Simmer the potatoes until they are slightly cooked but still al dente, about 3-4 minutes.

Step 4

Drain the potatoes.

Step 5

In a large skillet, melt 3 tablespoons of the butter over medium heat.

Step 6

Add the onion and cook, stirring frequently, until golden brown, about 10-12 minutes.

Step 7

Set the onion mixture aside.

Step 8

Melt the remaining butter in the same skillet.

Step 9

Add the potatoes and cook, stirring occasionally, until the potatoes are golden brown, about 8-10 minutes.

Step 10

Add the cooked onions, rosemary, and pepper, tossing to combine.

Step 11

Cook until heated through.

Step 12

Taste for seasoning.

Step 13

Serve.