To prepare a vegetarian steamed dumplings recipe, first you need to prepare your ingredients. First, you'll need the following ingredients: 1 cup (240 milliliters) of water, 1 teaspoon of salt, and 1 tablespoon of vegetable shortening. Heat the water to boiling, then add the vegetables and cook until they're tender, about 5 minutes. Add the thyme and stir to combine. Then, add in the egg yolks and mix until the mixture is completely combined. You can use any type of egg for this recipe.