01 - In a mixing bowl, whisk together coconut milk, olive oil, lime juice, curry powder, soy sauce, minced garlic, grated ginger, ground cumin, black pepper, and sea salt until thoroughly combined.
02 - Place the portobello mushrooms in a large dish or zip-top bag. Pour the prepared marinade over the mushrooms, ensuring all surfaces are evenly coated. Allow to marinate for a minimum of 20 minutes, or up to 2 hours for a more intense flavor, turning occasionally.
03 - Preheat your grill or grill pan to medium-high heat. Lightly oil the grill grates to prevent sticking.
04 - Remove the marinated mushrooms from the marinade, allowing any excess to drip off. Reserve the leftover marinade for basting. Place the mushrooms gill-side down on the preheated grill and cook for 5–6 minutes. Flip the mushrooms, brush them with the reserved marinade, and continue grilling for another 5–6 minutes, or until tender and exhibiting slight charring.
05 - Transfer the grilled portobello mushrooms to a serving platter. Garnish with chopped fresh cilantro and serve immediately with lime wedges.