2 tablespoons olive oil
2 medium yellow onions, peeled and diced
1 1/2 teaspoons salt
1/2 teaspoon freshly ground black pepper
2 garlic cloves, minced or pureed
2 medium Yukon Gold potatoes, peeled and sliced thin
5 cups chicken stock
16 ounces frozen baby peas
1/3 cup sour cream
3 tablespoons freshly chopped mint