Cook the penne al dente according to the instructions on the package.
In the meantime, cut the fillet into strips, season and fry in olive oil. Remove from the pan - cover with aluminum foil.
Put the cooked noodles in the frying liquid of the fillets. Now gaributter, lemon juice, finely chopped. Add the chilli peppers and parsley to the noodles, add the fillet, season with salt and pepper.
If necessary, add a few more tablespoons of pasta boiling water.