Preheat oven to 425°F.
Heat a pan on medium-high heat with a drizzle of high smoke-point oil (vegetable, canola, avocado, etc.) until it sizzles when you splash a bit of water into it.
Remove the casing from the Italian sausage and form it into a patty about 1/4 inch thick.
1 link sweet or hot Italian sausage
Place the sausage patty in the pan and sear it until golden brown on one side.
Flip and place mozzarella cheese on the patty to begin melting.
2 slices fresh mozzarella
Once both sides of the sausage patty are browned, transfer it to the oven to melt the cheese and keep it warm as you toast your bread in the pan.
Toast sandwich bread in the pan.
bread of your choice
When the bread is toasted and the cheese on the sausage patty is melted, assemble the sandwich and enjoy.
1 link sweet or hot Italian sausage, 2 slices fresh mozzarella, 2 tbsp Balsamic Sun-dried Tomato 'Chimichurri', bread of your choice