In a shallow baking dish, whisk all your marinade ingredients together. Taste and add more of ingredients as needed. I don’t typically like to measure, I think tasting and eyeing it as you go is best.
Allow your mushrooms to marinate all day, covered, and store in the fridge. Can also be marinated a few hours before grilling.
Heat a grill pan on medium-high heat (can also be barbecued) When pan is fully heated
Grill your mushrooms top sides down first. They should sizzle in order to get those grill marks. Once you see the mushrooms start to soften and flatten out a but, flip them over and grill the bottom sides.
Pour the remaining marinade into the pan. Keep grilling until your mushrooms appear fully cooked, soft, and juicy.
Notes
Serve with a side of baked potatoes and sautéed asparagus.