Best Portobello Steaks

In a baking dish whisk together the balsamic vinegar, oil, soy sauce, garlic, and all spices. 2. Add the portobello mushrooms and brush with the marinade on all sides. 3. Marinate at least 10-15 minutes while prepping a side dish. 4. Heat a grill or skillet over medium-high heat and spray with cooking spray. 5. Cook the mushrooms 4-5 minutes per side until deep golden brown, brushing with the remaining marinade while cooking. 6. Serve with a side such as potato salad.