Sunday Brunch: Sausage And Feta Hand Pies

Name: Sunday Brunch: Sausage And Feta Hand Pies
Ingredients: Olive oil; 2-3 sweet Italian sausages (2/3-1 pound total), casings removed; 1 large onion, thinly sliced; 1 head fennel, trimmed, cored, and thinly sliced; 1/2 teaspoon crushed red pepper flakes (optional); Salt; Pepper; 1 pound plum tomatoes, quartered lengthwise, seeded, and cut into 1/2-inch dice; 8 ounces feta cheese, crumbled; 1/2 cup flat leaf parsley leaves, chopped; Flour for dusting; 1 large egg, lightly beaten; 2 tablespoons fennel seeds