Recipe: Brussels Sprouts with Bacon, Red Onion and Avocado

-4 strips thick cut bacon

-½ red onion, thinly sliced

-2 teaspoons olive oil

-1 pound Brussels Sprouts, trimmed and halved

-½ cup chicken stock

-1 medium avocado, cut into chunks

-2 tablespoons olive oil

-2 tablespoons balsamic vinegar

-kosher salt and black pepper