Peas with liver and mustard

Peas with liver and mustard

10 ounces partially thawed frozen or fresh shelled peas (1 3/4 cups)

1 onion, thinly sliced

0.5 kg livers

1 tablespoon garlic

1 teaspoon ginger

1/4 cup butter (or oil), divided

3 tablespoon mustard

Salt to taste 

In a medium skillet cook the liver with the garlic, ginger, onion, salt to taste and mustard, until the onion is translucent and the liver is cooked.

Add the pea and cook for 3 mins and salt to taste.