how can I mince a small amount of meat?
There are a few workarounds to mince your meat, but the results may be not what you are looking for:


Some immersion blenders have a special attachment especially for mincing meat or stringy veggies. It's got two super-sharp "winglets". (I'll add a photo once I find mine.) You need to be super careful and fast, or the meat will be more like a puree / paté instead of tiny minced pieces.
Food processors will have similar issues: blend a second too long and you have a farce again.


This is based on the fact that meat grinders are based on a totally different principle - they push the meat towards the holes and cut off tiny pieces from the larger chunks while the rotating knives puree the food.
If you are ok with that, they can be an alternative to dragging out the large meat grinder (and cleaning it afterwards). Note that both substitutes require prepping the meat carefully - remove all sinews and similar. Also, chill your meat well. Cold meat will keep its consistency better than slightly warmer meat.

I personally would use a large chopping board and a sharp large knife and chop up the few servings before bothering with tools. But YMMV - it depends on how comfortable and skilled you are with your knife.