Let the puff pastry thaw. Peel and core the apples and cut into small cubes. Cut the spring onions into small rings.
Fry the onions, apples and bacon in a small pan in a little oil, they should only be lightly brown. Then let it cool down a little, stir with the crème fraîche and season with salt, pepper and, if you like, a little garlic. Halve the puff pastry sheets and line small muffin tins with them (works best if you cut into the corners a little). Fill with the crème fraîche mixture.
Bake in a hot oven at 200 ° C top / bottom heat for approx. 20 - 25 minutes.
A small salad and a cool Pinot Gris from Rheinhessen go well with it.
The above quantities result in 2 tartlets per person, this is a small main meal, 1 tartlet per person should be enough as a starter.