Note: the original recipe's word "piszke" is an obsolete term of uncertain meaning — based on the description (braising, dusting with flour, broth-sugar-sour cream), we've interpreted it here as green peas.
Braise the green peas (if fresh, cleaned and washed) in a little lard or butter, covered, over low heat, until tender.
Once tender, dust with the flour and cook for another minute.
Pour in the broth, season with salt and sugar, and cook for a few minutes until the sauce comes together.
Remove from the heat, stir in the sour cream, and serve warm.
Based on: Malatinszky Fanny szakácskönyve (a classic Hungarian cookbook), modernised. Calories and protein are estimated.