In a large stand mixer, combine sugar, instant yeast, sea salt, and water.
Allow the mixture to rest for a few minutes while the yeast is activated and foamy.
Add the bread flour and olive oil to the mixer.
Using the dough hook, knead the dough for 8-10 minutes.
Remove the mixing bowl from the mixer and cover with a tea towel.
Allow the dough to rise for 1 hour.
In a large cast iron skillet over medium heat, cook the ground sausage until crumbly, no longer pink and fully cooked.
Mix the crushed red pepper flakes into the cooked sausage.
Set aside to cool slightly.
Preheat the oven to 375℉.
Punch down the dough and place on a clean, lightly floured work surface.
Using a rolling pin, roll the dough into a 11x24 rectangle.
Lightly brush egg wash over the entire dough rectangle but do not discard it! The rest of the egg wash will be used on the outside of the sausage bread.
Sprinkle the entire rectangle with mozzarella cheese.
Spread the cooked sausage onto the entire rectangle.
Starting at the end closest to you, gently roll the dough, like a jelly roll, into a 24-inch-long log.
At the end of the log, pinch the dough to remove the creases.
Gently fold the log into a ring shape, tucking the ends into each other.
Gently lift the ring onto a parchment paper lined baking sheet.
Brush the entire outside of the sausage bread with egg wash.
Shred the parmesan cheese onto the top of the loaf.
Bake for 30-35 minutes.
Remove the sausage bread from the oven and allow to cool on a cooling rack for at least 30 minutes before slicing.