Alaska Smoked Salmon Fettuccine

2 cloves garlic, minced
1 tsp. tarragon, crushed
4 tsp. butter
2 tbsp. Dijon mustard
2 cups heavy cream
3⁄4-1 lb. Alaska smoked salmon, cut or torn into strips
2⁄3 cup Parmesan, grated
16 oz. fettuccine, cooked, drainedparsley, chopped, for garnish