*I use 5 flax eggs for this recipe, instead of just 3 real eggs. Each flax egg is made by mixing 1 tbsp of ground flax with 2 tbsp of warm water – then set aside to thicken for a few minutes. (So, 5 tbsp ground flax and 10 tbsp of warm water for this recipe.)
Flax eggs will NOT hold the casserole together the same way that real eggs will. I actually prefer the flax eggs for this, as it keeps the casserole creamy and not too “baked egg”-like. However, if you want a very “sliceable” casserole, use real eggs.
** If you can tolerate dairy, mix in that sour cream! If you’re following a whole30, make sure you use a compliant almond/coconut yogurt. If you’re simple dairy-intolerant or staying away from it, just make sure you’re using a plain, UNSWEETENED variety. Check your sugars! Forager plain cashew yogurt is one of my favorites!
…OR simply omit it! You’re still going to get that savory beef stroganoff flavor without it.