Heat the olive oil and briefly sauté the finely chopped onion. Briefly wash the tree spinach leaves (if possible freshly harvested), add them to the onions while still dripping wet and let them collapse in the pot like the well-known spinach. Deglaze with a dash of white wine and season with salt and pepper. Pour the crème fraîche and the thinly sliced cheese over it and stir a little.
Turn off the stove, cover the saucepan and let the cheese melt in the residual heat.
Before serving, remove the saucepan from the heat (to protect the fine enzymes in the honey and the vitamins in the lemon juice) and pour the thinest possible honey and an appropriate amount of freshly squeezed lemon juice over the food and serve immediately.