In a small bowl, whisk together 1 cup plain yogurt, 3 tbs. crushed dill weed, juice of 1/2 lemon, ground white pepper to taste. Cover and refrigerate for an hour or more. When ready to cook, bring sauce to room temperature.
Sprinkle Spanish paprika on both sides of a 1 lb. cod filet. Sauté the filet in a fry pan in a little olive oil and butter. Quickly brown on each side, so moist and not overcooked. Remove from skillet and spoon sauce over cod. Serve with rice and fresh asparagus vinaigrette. Serves 2.