Preheat oven to 350F. Butter six 3/4-cup soufflé dishes. Place 1
tablespoon Parmesan in each dish; rotate dishes to coat with cheese,
leaving excess in dishes. Place dishes on baking sheet. Whisk milk and
yolks in bowl to blend. Melt butter in saucepan over medium-high heat.
Add onion, thyme, and rosemary; sauté 3 minutes. Add flour; whisk 1
minute. Whisk in milk mixture. Whisk soufflé base until thick and
bubbling, about 2 minutes. Remove pan from heat. Add 1/2 cup goat
cheese, salt, black pepper, and cayenne pepper; whisk until cheese
melts. Beat whites in bowl until stiff but not dry. Fold 1/4 of whites
into base in pan. Sprinkle remaining 1/2 cup goat cheese and 1
tablespoon Parmesan over. Fold in remaining whites in 2 additions.
Divide mixture among dishes. Bake soufflés until puffed and beginning
to brown on top, about 20 minutes. Serve immediately.