Vegan Korean Beef Tacos

Name: Vegan Korean Beef Tacos
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Asian, Korean
Ingredients: 1 medium zucchini (thinly sliced, I used 1/2 green and 1/2 yellow); 1/2 cup vinegar (you can use apple cider or white); 1/2 cup water; 1 tablespoon sugar; 1 1/2 teaspoons salt; 1/2 tablespoon sichuan peppercorns (optional); 1/4 cup brown sugar; 1/4 cup low sodium soy sauce; 2 tablespoons sesame oil; 1-3 teaspoons gochujang (to taste); 1/2 teaspoon ginger powder; 1 tablespoon oil; 3 cloves garlic (diced); 1 small yellow onion (sliced); 6 ounces cooked lentils; 6 ounces vegan beef crumbles; 8 taco-sized tortillas (I used flour); 1 cup red cabbage (shredded); spicy mayo*; green onion (diced)