Dissolve yeast and sugar in warm water; let stand for 5-10 minutes until foamy.

Stir in parmesan, oil, salt, and pepper.

Beat in flour until a soft dough forms.

Knead dough on a floured surface for 5-10 minutes until smooth and elastic.

Place dough in a greased bowl, turning to coat.

Cover and let rise in a warm place for about 40 minutes, or until doubled in size.

Cook sausage in a skillet over medium heat until browned; drain on paper towels.

Combine sausage, bread crumbs, egg, Parmesan, parsley, and thyme in a bowl; mix well.

Grease baking sheets.

Punch down dough.

Roll dough to 1/8-inch thickness on a floured surface.

Cut dough into squares or circles.

Spoon filling into the center of each piece.

Brush edges with water.

Fold dough to form packets.

Place on baking sheets.

Cover loosely and let rise for 25 minutes.

Preheat oven to 350°F (175°C).

Brush turnovers with egg.

Sprinkle with Parmesan.

Bake for about 12-15 minutes, or until golden brown.