Baked Piroshki (Russian Stuffed Rolls)

INGREDIENTS

1 cup

milk, (warmed to 90F)

1 tbsp

sugar

1 1/2 tsp

active dry yeast

3 cups

unbleached all purpose flour

egg, (room temperature)

1 tbsp

salted butter (softened)

1/2 tsp

salt

egg beaten with 1 Tbsp water ((for the egg wash))

1/2 lb

ground beef ((90% lean))

1/2

onion, (minced)

1 tbsp

dill

1/2 tsp

salt

ground black pepper

hard boiled egg, (chopped (optional))

1 tsp

salted butter

1/2

onion, (diced)

1 cup

button mushrooms, (chopped)

3 cups

cabbage, (shredded)

3/4 tsp

salt

1/2 tsp

dill

1/4 tsp

ground black pepper