If you want to make it thicker still, stir in some starch or flour, but be careful about it.

Tomato puree works for thickening too, as does olive oil.

If you feel the need for protein, pour in a handful of chopped nuts, pine kernels, or flaked almonds (warning: this raises the fat content a fair bit).

Could also use canned pulses - chickpeas, flageolet beans, kidney beans, etc.

fresh ginger, chopped small (peel it and use a serrated knife)

Easiest way to peel ginger == with the side of a teaspoon.

or grated if you can be bothered

You can get away without the peeling if you grate it.