2 large portabella mushroom caps, stems removed |
extra virgin olive oil, for drizzling |
2 links italian sausage, removed from casing (sweet or hot) |
1/2 cup marinara sauce or 1/2 cup pizza sauce |
4 slices mozzarella cheese or 4 slices smoked mozzarella cheese |
crushed red pepper flakes |
italian seasoning or dried oregano |