1. Preheat oven to 200 F

2. Cut bread in half lengthwise, then hollow out to make two bread boats.

3. Crisp bread in the oven; then remove and reserve.

4. Turn on the oven's broiler.

5. Heat a skillet over medium-high heat; add oil.

6. Add ground turkey; season liberally with salt and pepper.

7. Brown and crumble for 3 minutes.

8. Add onions; cook 10 minutes more, stirring frequently.

9. Add Worcestershire sauce and mix in; remove from heat.

10. Spread mustard across the insides of the breads to taste.

11. Fill bread boats with meat and onions; top with grated cheese.

12. Melt cheese under broiler; garnish with parsley.