Prepare the Maple Miso Sauce: In a small bowl, whisk together maple syrup, miso, tamari, rice vinegar, ginger, garlic, and smoked paprika until smooth.
Cook the Tempeh: Heat oil in a pan over medium heat. Add crumbled tempeh and sauté for 3-4 minutes.
Pour in the maple miso sauce and stir well. Cook for another 3-5 minutes until the tempeh is caramelized and coated. Remove from heat.
Assemble the Tacos: Warm tortillas in a dry skillet or over an open flame for a slight char.
Divide the tempeh mixture among the tortillas.
Top with cabbage, carrot, cucumber, green onions, and cilantro.
Drizzle with sriracha mayo and sprinkle sesame seeds if using.
Squeeze fresh lime juice over the tacos and enjoy immediately.