Bake quiche for 40 minutes or until just set in the middle. Over a very low heat fry 3 red onions in 2 Tbsp oil for 10 minutes. Add 2 Tbsp red wine vinegar and 1 tsp sugar and cook another 20 ...

Stir in the onion and 1/2 teaspoon of the salt ... and then pour the egg-cheese mixture over the vegetables. Place the quiche on a rimmed baking sheet and bake until the filling is browned ...

Coat a large sauce pan with a little bit of olive oil or cooking spray. Add onions over medium heat and cook until tender, about 5-7 minutes. Add the Guinness to the pan, stir and cover.