To prepare a vegan mexican menudo recipe, first you need to prepare the meat. First, you'll need the following ingredients: 2 tbsp. kosher salt, 12 cup (120 ml) vegetable oil, and 1 tablespoon (25 g) dried or fresh chile flakes. Heat the oil over medium-high heat until it's shimmering. Add the onion and garlic and cook until the onions are translucent and the garlic is fragrant, about 5 minutes. Then add the tomato paste and stir to combine. Cook the mixture for 1 to 2 minutes, until thickened, then add salt and pepper to taste.