Prepare Flax Egg: In a small bowl, mix the ground flaxseed with water. Let it sit for 5 minutes to thicken.
Mash Chickpeas: In a large bowl, mash the chickpeas with a fork or potato masher until mostly smooth but with some texture remaining.
Mix Ingredients: Add the oats, breadcrumbs, nutritional yeast, soy sauce, olive oil, smoked paprika, garlic powder, onion powder, fennel seeds, thyme, and the flax egg. Mix until well combined.
Form Sausages: Divide the mixture into 6 equal portions and shape into sausage-like rolls.
Cook Sausages: Heat olive oil in a skillet over medium heat. Cook the sausages for 3-4 minutes on each side, turning occasionally, until golden brown and crispy on the outside.
Serve: Serve with your favorite sides or in a bun for a sausage sandwich. Enjoy!