Roast tempeh: Heat oven to 400 degrees Fahrenheit (about 200 degrees Celsius). To a medium mixing bowl, add soy sauce, lemon juice, maple syrup, garlic powder, and onion powder and whisk to combine. Then add crumbled tempeh, mixing to coat, and let marinate for 5-10 minutes. Then add oil to a baking sheet and add marinated tofu. Bake until tofu is crispy, about 13-15 minutes, stirring halfway throughout to cook on both sides.
2 tablespoons soy sauce, 1 tablespoon lemon juice, 2 teaspoons maple syrup, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 8 ounces tempeh, 2 teaspoons olive oil