What is Reddit's opinion of Cuisinart Immersion Hand Blender with Storage Bag?
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What I would recommend is actually getting an immersion blender (cuisinart actually makes really solid, affordable model). It's a really underrated kitchen appliance that every professional chef has in their kitchen. The one I linked to above (and other models from other manufacturers) comes with a whisk attachment, which serves as a more than satisfactory substitution for a hand-mixer -- especially if you're just trying to make meringues and omelettes and things of that nature (as opposed to serious baking projects).

It's literally a manual food processor.

They make immersion blenders that use various attachments like a small food processor just like this one. I would go that route.

Cuisinart HB-900PC Immersion Hand Blender with Storage Bag https://www.amazon.com/dp/B09LTTMMRS/ref=cm_sw_r_apan_glt_fabc_WZ4BCBATCZT68QJ8PGFN

So sorry for your husband's illness. Rather than offer my food suggestions you should consult a detailed guidance from nutritionists. Soft diets are a very common medical need. This reference has much useful information:

https://www.healthline.com/nutrition/soft-food-diet#foods-to-eat

One tip I will offer is to purchase an immersioin blender. It can turn many familiar foods into smooth purees. This kit is similar to the one I have owned for many years.

Every best wish for a good outcome to you both.

https://smile.amazon.com/Cuisinart-Immersion-Hand-Blender-Storage/dp/B09LTTMMRS/