For the vegetables
01 -
1 1/2 lb (680 g) baby red or Yukon gold potatoes, scrubbed
02 -
1 1/2 cups (210 g) fresh shelled peas or frozen peas
03 -
1 tablespoon kosher salt, for the potato water
For the cream sauce
04 -
2 tablespoons (28 g) unsalted butter
05 -
2 tablespoons finely chopped yellow onion
06 -
2 tablespoons (16 g) all-purpose flour
07 -
1 1/2 cups (360 ml) whole milk, plus more for loosening
08 -
1/2 teaspoon low-sodium vegetable bouillon paste or 1/4 teaspoon granulated bouillon, optional
09 -
1/2 teaspoon fine salt, plus more to taste
10 -
1/4 teaspoon black pepper
11 -
1 tablespoon chopped parsley, optional