Spicy Cauliflower Steak with Miso Sauce

Ingredients

• 2 tablespoons grapeseed or safflower oil
• 2 cauliflower steaks (see "Pro Tip" below)
• 1/2 cup leeks, white and light green parts only, sliced
• 1 tablespoon nutritional yeast
• 2 teaspoons minced fresh oregano
• 1 teaspoon smoked paprika
• 1/2 teaspoon red pepper flakes
• 1/2 teaspoon sea salt
• 1 tablespoon vegan butter
• 1/2 cup diced onion
• 1 teaspoon minced garlic
• 1 teaspoon minced fresh ginger
• 3/4 cup water
• 1 tablespoon chickpea miso
• 1 tablespoon sriracha
• 1 teaspoon cornstarch
• 1 teaspoon toasted sesame seed oil
• 1/4 teaspoon sea salt
• 2 fresh thyme sprigs, for garnish