In a medium skillet over medium heat, cook the sausage until cooked through, breaking up any clumps with the back of a wooden spoon, about 8 minutes. Transfer to a paper towel lined plate to drain. (if your sausage is in links, remove the casings before cooking).
Spread the sausage in a small casserole dish or heatproof bowl, or in two 8-ounce ramekins.
Spoon the marinara sauce over the sausage and layer on the cheese and toppings. Save a little cheese to sprinkle over the topppings so that they stay in place.
Air fry at 350F for 8 to 12 minutes, or bake in a 375F oven for 10 to 15 minutes.