I use cashews in my pesto and I'm not eating much oil so i put a tiny slug of oil and some water in my pesto before blending. Then I topped the mushies with that before baking the lot. Cuts down on the garlic breath and they stay moist.
so long as it tastes good.... I have an aversion to 'large' mushrooms and especially baked ones (how can anyone bake them when they are a marriage made in heaven with butter??). Seriously, 'Thou shalt cook mushrooms only in butter' coulda been the 11th commandment (if you dont believe me, try when you are having a 'naughty' day...)