Wash baby chard and chard leaves, spin dry separately in SPEEDWING® salad spinner and cut chard leaves into wide strips. Wash stems and cut into thin slices. Put everything in a bowl.
Coarsely chop the walnuts, break up the feta cheese with a fork. Peel mango and cut into small cubes.
Roast walnuts in a pan without fat.
Season the lamb fillets, fry them in the olive oil and add the garlic. Add remaining dressing ingredients, toss, remove fillets and keep warm.
Mix the chard leaves and stems with the dressing and allow to infuse for 5 minutes.
Divide the salad among plates, slice the fillets, arrange them on top and sprinkle with diced chard, feta cheese and walnuts.
Tip: Instead of chard, you can also prepare this salad with 300 g fresh spinach leaves and 300 g celery.