For an even more intense mushroom flavor, rehydrate the dried porcini in hot water for 30 minutes before processing. Drain well before adding to the salt mixture. If you don't have a food processor, you can whisk the aioli ingredients together by hand, but be prepared for a bit of a workout! Feel free to substitute other cheeses for the goat cheese, such as feta, brie, or a sharp cheddar. Add a grilled portobello mushroom for a vegetarian option.