In a large bowl, dissolve yeast in 1 cup of lukewarm water.

Let sit for 5-10 minutes until small bubbles form around the edges.

Whisk in sugar, salt, and egg until thoroughly blended.

Using a wooden spoon, stir in flour and melted butter until the dough comes together.

Gently mix with your hands until it forms a smooth ball of dough.

Return the dough to the cleaned bowl and cover with plastic wrap.

Let rise in a warm place until doubled in size, about 1 1/2 hours.

Turn out the dough onto a lightly floured work surface and gently squeeze out any air bubbles.

Fill and shape the dough as desired for your stuffed bread.

Bake according to your stuffed bread recipe instructions.