Sausage sizzle with beer braised onions

Name: Sausage sizzle with beer braised onions
Prep time: 10 min
Cook time: 1 h 15 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 20 g extra virgin olive oil; 10 g salted butter; 4 brown onions; 1 - 2 pinches salt; 1 - 2 pinches ground black pepper; 250 g beer; 20 g Dijon mustard; 15 g honey; 8 sausages; 8 hot dog rolls; barbecue sauce