boursin quiche

0 Preheat the oven to 375°F and place a tray on the bottom rack. Boil at least 2 cups of water. Prepare a round pan by spraying it with non-stick spray or greasing it with [wprm-ingredient text="1 tbsp butter" uid="7"]. I love to use a springform pan for crustless quiches!
1 Over medium to low heat, melt the butter and saute the [wprm-ingredient text="1 red onion" uid="6"] until translucent and fragrant. Season them with a pinch of salt. The slower you saute, the sweeter they will become.
2 While the onions cook, add everything else, except the [wprm-ingredient text="1 cup button mushroom" uid="5"], to a blender and blend till smooth. In the preheat oven, on the lower rack (make sure you have 2 racks set), place a pan and pour int he boiling water.
3 Place the mushrooms and caramelized onions in your prepared circular pan or springform, and then pour the egg mixture over them. Stir as needed to distribute the ingredients evenly. Bake on the rack above the boiling water one for 40-45 minutes, then let cool for at least another 20 before slicing. It’ll continue to set up.Baking with a pan of boiling water creates a steamy environment for the best texture! Just don't forget to take it out when you're done.