champagne sparkling wine

Hi everyone, thank you very much for allowing me to join the forum. I have a question about brewing elderflower champagne. I am trying a recipe used a lot where I live in rural France. Simply, you create a mix of sugared warm water, lemons, limes, white wine vinegar, elderflowers and wine...

I get the basic process of sparkling wine, so make a base wine and leave to clear. Then at bottling state add rehydrated yeast and some sugar but not sulphites or stabilisers. Leave to ferment in the bottle then go through the process of riddling and disgorging by leaving the bottles upside...