4 tablespoons butter, plus 2 tablespoons butter
1 small onion, cubed
1/2 cup red and green cubed peppers
1/2 cup cubed, blanched carrots
1/2 cup sliced celery
2 tablespoons flour
3 cups milk
Salt and pepper
1 pinch dried herbs de Provence
2 tablespoons Dijon mustard
1/2 cup thawed corn
1/2 cup small cherry tomatoes
2 pounds lean turkey breast
1 sheet doughboy frozen dough
1 egg yolk