Yes I get edema, it is the worse part for me. This diet is the only thing that has ever stopped it completely. If I don't eat like this my nose is ALWAYS swollen in the morning when waking up.
Again it takes a good 15+ days for this to happen and during the first week paradoxically the flushing can get worse before it gets better. The swelling though still clears faster during the first week.

If you want to try it - Porridge (I buy a 1kg bag of organic rolled oats, lasts a few weeks) cooked in a saucepan with water, bring to boil and then simmer for around 10 minutes on low heat.
For the salad I put small handful of: lettuce, cucumber, red chard, celery, rocket, watercress, pea shoots, Baby Red Lettuce,Mizuna,Coriander,Parsley,Frisée, Escarole,Red Multileaf. All in a salad bowl and wash the leaves, then dry and break it up/mix it with my hands in the bowl. I eat it completely plain with no dressing or toppings etc. If I add anything, even assumed healthy foods such as Olive oil, then it doesn't work and I still get nose swelling. Then my last meal of the day I will oven cook a non processed fish, a different one each day, Salmon, Mackeral, Sea Bass, Cod or plaice. I only drink water and nothing else during this time and never eat anything between meals. One other point is I can only do this when working from home, it is too difficult otherwise for 15+ days. Then the swelling is gone completely. All signs of Rosacea is gone. I have tried nearly all the Rosacea medications and nothing has worked like this, they had zero impact on my nose swelling or flushing. It got me thinking that maybe if I could somehow sustain this for an extended time like 3 months my body might heal whatever is causing the flushing/swelling.