Whisk Ruby Red Grapefruit fruit drink and mustard together with oil, salt and pepper. Or place all ingredients in a jar and shake well.
Heat a large oiled fry pan. Add butter and then perch fillets and cook for 4 minutes until golden on one side.
Turn fish gently and cook for a further 3 minutes, then turn off heat.
Toss the salad greens in a bowl with the fennel and dress with 1 tablespoon of the Ruby Red Grapefruit dressing and serve with the fish.
The salad dressing will keep in the fridge for up to 2 weeks, use it to flavour any cold salad or finish grilled meats
Source: Pete Evans