Dump all the marinade ingredients into a medium bowl. Mix to combine thoroughly.
2 scallion, 1 teaspoon fresh thyme leaves, 1 inch piece fresh ginger, 2 cloves fresh garlic, 1 teaspoon porcini powder, 1/2 teaspoon ground cumin, 1/2 - 1 teaspoon red pepper flakes, 1/2 - 1 tablespoon sesame oil, 1 tablespoon extra virgin olive oil, 1/2 teaspoon freshly ground black pepper, OPTIONAL: 1/4 teaspoon kosher salt