Begin browning sausage in a deep skillet, breaking into chunks as it cooks. (If starting with frozen sausage thaw for ~90 sec. in the microwave, then begin browning.)
When sausage is browned remove from skillet and set aside.
In the same skillet, saute peppers and onions. When they are soft, add the garlic.
Add the liquid, scraping up any browned bits and bring to a simmer.
Add the sausage back in, and the balsamic.
Simmer for a few minutes (if it's sticking add a bit more liquid).
Serve on crusty Italian rolls.
Recipe by CedarValleySustainable at http://cedarvalleysustainable.com/blog/2014/05/07/italian-sausage-hoagies/