To prepare a veggie potstickers 4647 recipe, first you need to prepare your ingredients. First, you'll need the following ingredients: 14 cup vegetable oil 2 tablespoons vegetable shortening Instructions: Heat the oil over medium-high heat. Add the onion and cook until softened, about 5 minutes. Stir in the garlic and season with salt and pepper. Cook and stir for 1 minute, then add the carrots, celery, and bell peppers. Simmer until the vegetables are heated through and the sweetener has evaporated. Pour the vegetable mixture into the pot and cover with cling wrap. Bake for 20 minutes, or until browned and bubbly. Remove from the oven and allow to cool before slicing.