First clean the chanterelles, halve or quarter them if necessary.
Wash the spring onions and cut into rings. Separate a little from the green parts.
Now sauté the chanterelles and spring onions in the butter for 5 minutes. Season with salt and pepper. Allow to cool slightly.
Preheat the oven to 220 ° top / bottom heat.
Roll out the tarte flambée batter on a baking sheet.
Spread the sour cream on top. Leave something free at the edge. Slice the cheese over it. Then spread the red onion cut into rings on top, as well as the diced ham. Finally, distribute the mushroom mixture evenly and place in the oven for 15 minutes on the lowest rack. The baking time can vary slightly depending on the oven. Finally, distribute the spring onion rings on top.
And then just enjoy. It tasted really good.