Smoked oyster crostini with cauliflower and fennel cream

Name: Smoked oyster crostini with cauliflower and fennel cream
Prep time: 40 min
Cook time: 30 min
Total time: 1 h 10 min
Cuisine: Australian
Ingredients: 12 oysters; 12 thin slices sourdough baguette; To serve: parsley; 250 ml olive oil (1 cup); 1 cup flat-leaf parsley leaves (firmly packed); 530 gm cauliflower, broken into florets; 1 baby fennel bulb, thinly sliced; 1 small onion, thinly sliced; 3 garlic cloves; 300 ml milk