Add 2 tablespoons soy sauce, 1 tablespoon balsamic vinegar, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/2 teaspoon dried rosemary, 1/2 teaspoon dried oregano, 1/2 teaspoon dried thyme, 1/2 teaspoon paprika, and 1/4 teaspoon black pepper to container with a tight-fitting lid (or freezer bag), then mix well.
Cut 1 block tempeh into bite-sized pieces, then add them to the container.
Close the lid tightly, then gently turn it upside down a few times to distribute the marinade.
Let the tempeh marinate in the fridge for at least 2 hours (up to 48 hours is fine).
When the tempeh has finished marinating, preheat the oven to 350 degrees Fahrenheit.
Place the tempeh in a single layer on a lightly greased 9-inch baking dish.
Bake for 27 minutes or until golden brown.