Cook the pasta following the instructions on the packaging.
Meanwhile, dry-fry the almonds (without oil) until golden, then transfer to a plate.
Heat a little oil in the pan, cook the onion until soft.
Pour boiling water over spinach. Drain and squeeze out the water through the sieve with the bottom of a spoon, then chop it up.
Drain the pasta.
Add the spinach to the onion, add the chilli and Greek yogurt, and heat through.
Stir in the pasta and crumble the cheese over. Taste and season with salt and pepper to taste.
Stir through a few times, then serve with the almonds scattered on top.