Pickled Mushrooms From 'Bar Tartine'

Preheat the oven to 350°F/180°C. In a large roasting pan, combine the mushrooms with 1 tbsp of the oil and 1 1/2 tsp of the salt and toss to coat. Roast until tender, about 10 minutes. In a large bowl, combine the vinegar, garlic, parsley, marjoram, paprika, brown sugar, onion powder, garlic powder, lemon zest, pepper, and the remaining 1 1/2 tsp salt and mix well. Add the warm mushrooms and stir and toss to coat the mushrooms evenly. Chill the mushrooms completely in the refrigerator before serving, about 2 hours. Transfer the mushrooms and brine to one or more nonreactive containers and refrigerate for up to 1 month.