Scallops with lemon

5 tablespoons butter 2 tablespoons olive oil 1 large sweet onion (such as Vidalia or Maui), halved, thickly sliced crosswise 4 garlic cloves, minced 24[...]

1 cup chopped parsley 3 tablespoons coarsely chopped pistachios 1 teaspoon grated lemon rind 1/4 teaspoon ground cumin 1/4 teaspoon fresh ground black pepper[...]