You need to have a basic chicken stock base and then throw everytttthing in there: noodles, kreplach, matzo balls, carrots, pieces of chicken. Nothing is too much!
Well, it depends what's in your mish mash soup! Usually a combination of egg noodles, kreplach, matzo balls and chicken broth with pieces of cooked chicken, carrots & onions. Reply with what's in your soup and I can help with recipe.