Meanwhile make the mushroom topping. In a large sauté pan heat the olive oil over medium heat. Add the mushrooms and sprinkle with a bit of sea salt to taste. Sauté until they just begin to turn a light golden-brown color. Add the sliced shallot and cook for an additional 2-3 minutes until the shallot is sweet, soft, and also gently caramelized. Adjust seasoning as desired with salt and pepper, and set aside to cool while the dough rises. Alternatively, you can use your bread machine or stand mixer to mix and knead the dough.