To make this recipe vegetarian, you will want to replace the bacon and sausage. It also has egg, so if that's a problem, just leave it out. Here are some recommendations for substitutes for the sausage and bacon. Diced Portabella mushrooms are great for the meaty texture and then for the smoky flavor, you can use a teaspoon of smoked paprika. You can also use meat alternatives or diced extra firm tofu with paprika. They also make vegetarian chorizo, so check that out!