Combine wine, saffron, garlic, fennel bulb and tomato in a 4l microwave-safe bowl or deep casserole dish. Cover with a vented microwave-safe lid or vented microwave-safe plastic wrap

Select 100% power and dial up 6 minutes and press START button

Remove from microwave and add mussels; cover tightly with lid or 2 layers of plastic wrap. Select 70% for 8 minutes and press START button. All mussels should have opened and cooked through

Stir in cream and chopped fennel prongs into mussel. Season with freshly ground black pepper and serve immediately with crusty bread