Brush the Sausage slices, bread slices and mushrooms with a bit of oil.
Heat a griddle pan until hot.
Cook the Sausage, bread and mushrooms on the griddle pan until done and griddle marks are visible.
Remove and set aside.
Blend the olive oil and parsley until fine to make parsley oil.
Turn the heat off and place the vine tomatoes in the pan to blister.
On 4 plates, stack 1 slice of bread, 1 mushroom, 2 Sausage slices, drizzle with parsley oil, top with a bread slice, mushroom and 1 sausage slice, drizzle with parsley oil, and finish with vine tomatoes.