My more recent tweak on a chaffle with a good P:E ratio: similar to above.

1 egg
1/2 c egg whites
1/2 c cottage cheese (I use 1%)
1 scoop whey protein or combination of whey and pea protein
1/8 tsp xanthan gum
1/2 Tbsp psyllium
1 Tbsp coconut flour

You can vary the amounts of these ingredients somewhat. You could probably skip the xanthan gum and psyllium, but I like how they improve the texture. The coconut flour seems to make the batter easier to deal with, without making them taste coconutty. I made these with half of the whey substituted with pea protein, and I noticed no particular taste difference. I never tried it with all pea protein, though.

Makes 6 (sometimes 7). Nutrition for 2 (assuming 6 total: )

132 cal
3 g fat
7 g carb - 2 g fiber = 5 net
20 g protein