Gnocchi salad with mushrooms

Ingredients

• 2 onions
• 350 g mixed mushrooms (e.g., chanterelles and brown mushrooms)
• salt, pepper
• 500 g fresh gnocchi (found in the refrigerated foods section of the supermarkt)
• 300 ml vegetable broth
• 2 tbs cider vinegar
• 1 tbs mustard
• 2 tbs olive oil
• 1 bunch radishes
• 1 red-skinned apple
• 1 bunch chives