How to Make the Ultimate Umami-Bomb Vegetarian Demi-Glace
2/3 cup extra-virgin olive oil
Zest of 2 large lemons, removed in wide strips with a vegetable peeler
3 bay leaves
3 large rosemary sprigs, cut into 1-inch lengths
1/2 teaspoon cracked black peppercorns
1/3 cup fresh lemon juice
1/3 cup water
In a medium saucepan, combine the olive oil with the lemon zest, bay leaves, rosemary sprigs and cracked peppercorns and cook over moderate heat just until sizzling. Add a large pinch of salt; remove from the heat. Let cool slightly, then stir in the lemon juice and water.
Use as a 1-hour marinade for swordfish, tuna or shrimp, or to marinate veal, chicken or pork for up to 4 hours before grilling, broiling or sautéing. Strain and toss with salad greens, olives and croutons and roasted potatoes or drizzle over poached fish.