Spelt Spaghetti with Kombu and Onion Broth | Saveur

Ingredients

• 3 tbsp. extra-virgin olive oil
• 5 onions, thinly sliced
• 3 shallots, thinly sliced
• 2 cloves garlic, crushed
• 2 leeks, white and light green parts only, thinly sliced on the diagonal
• Kosher salt and freshly ground black pepper, to taste
• 2 tbsp. sherry vinegar
• ¹⁄₄ cup madeira
• 6 cups vegetable stock
• ¹⁄₂ tsp. black peppercorns
• 3 small sprigs fresh thym
• 1 bay leaf
• 1 tbsp. white soy sauce
• 1 (1½″) piece ginger, peeled and thinly sliced
• 1 (5″) piece kombu
• 8 oz. spaghetti, preferably made with spelt
• 1 oz. shelled sea urchin (optional)