Basic Bread Dough For Stuffed Bread

In a large bowl stir yeast into 1 cup lukewarm water until dissolved.
Let sit until small bubbles form around edges. Whisk in sugar, salt
and egg until thoroughly blended. Using a wooden spoon, stir in flour
and butter until dough comes together. Mix gently with your hands
until it forms a smooth ball of dough. Return dough to cleaned bowl
and cover with plastic wrap. Let rise until doubled, about 1 1/2
hours. Turn out dough onto work surface and gently squeeze out air
bubbles. Fill and shape as desired. This recipe yields dough for 1
loaf of bread.