Roasting your onions transforms it into a sweeter, melt-in-your-mouth experience. Try this easy roasted onion recipe! Recipe: 5 medium sized brown onions, halved 100 grams of butter 2 cloves of sliced garlic 100g oyster sauce 1 liter of warm water 1. Melt butter in a pan and add garlic. Once melted, add oyster sauce and combine. Add water. 2. Place onions flat side down on a baking dish. Add sauce and submerge 3/4 of the way. Cover with foil and bake at 180C for 30-40 minutes. 3. Flip onions and