Question:
Can I blend a fleishig soup that has cooked onions in it, mixed with other veg, onion was chopped with a fleishig knife, with a parve/dairy blender?
Answer:
If the soup is not hot then on a temporary basis one can use a clean parve/dairy blender, providing you clean the blender afterwards thoroughly. But if the soup is hot (more than 45 C) you can only use a fleishig blender.
Sources:
Y:D 95:2, ,Y:D 96:3 Beis Meir, Even Haozer, Nachlas Shiva 61, Chochmas Adam 49:7
