I used uncooked brats for this sausage sheet pan dinner. However, the options are endless. You can use fully cooked smoked sausage. When I am using smoked sausage, I like to use a spicy one like Jalapeno cheddar. This recipe works well, even with chicken sausages. Just make sure to find sausages that are in brat form. Ground sausage like breakfast sausage or Italian sausage will not work well for this recipe.