Baked Sticky Tempeh Potstickers

Name: Baked Sticky Tempeh Potstickers
Ingredients: 1 tablespoon sesame oil; 1/2 medium onion, chopped; 2 cloves garlic, minced; 1/2 cup carrots, chopped; 1/2 cup mushrooms, chopped; 1 tablespoon ginger, minced; 2 tablespoons green onions, sliced; 1 8-ounce package tempeh; 1/4 cup low-sodium soy sauce, plus more for serving; 1 tablespoon cornstarch or tapioca starch; 1 teaspoon maple syrup; 1 tablespoon rice wine vinegar; 32 vegan wonton wrappers*; Oil for cooking (vegetable, avocado, grapeseed)