Tagliatelle ai funghi is an umami rich Italian pasta dish. This recipe uses a sweet onion puree in place of the traditional cream used in mushroom pasta recipes, so there's very little fat in this recipe!
Preheat oven to 350°F (175°C). Line a baking tray with parchment paper.
Peel the onions and cut them in half. Rub lightly with olive oil. Cut the top off the garlic bulb, remove the outer skins, rub in olive oil and wrap in foil. Transfer the onions and the garlic to the baking tray and bake for 35-40 minutes. When they are finished baking, slip the garlic cloves from their skin and puree with the onions in a food processor. If the puree is too lumpy, add a few tablespoons of water.
Grind the dried porcini mushrooms to a fine dust in a blender. Add ½ cup of water and the miso paste and blend until a smooth puree forms.
Cook the pasta according to the instructions on the packet, reserving 1½ cups of the pasta water. Drain and set aside
While the pasta is cooking, add the chestnut mushrooms and thyme to a large saute pan and saute for 7 minutes over medium heat. Add the roasted onion puree, porcini paste and reserved pasta water to the pan and simmer for 7 minutes.
Divide the pasta amongst 4 bowls and pour the sauce over the top.
Notes
You can make this recipe gluten free by subbing in a gluten free pasta.
Store leftover mushroom tagliatelle in an airtight container in the fridge for up to three days.