We buy packets of ready-made "gnocchi" (italian potato dumplings) because they're really quick to cook and they're nice. I made gnocchi from scratch once and it took hours and I got grated potato all over the kitchen. It wasn't pretty. These ready-made ones are really handy to have in the cupboard.
What you need, though, is to know how to make a very quick sauce to go with them. This evening I managed to do this one in pretty much 7 or 8 minutes because we were in a rush - and it's really nice!
These amounts are to serve two.
Start a large kettle of water boiling; and put a tablespoon of olive oil in a saucepan over a medium heat.
Rinse the tomatoes and chop them into slices. Put them into the saucepan. They'll immediately start to soften. Put the tsp of sugar on top of them (don't stir yet).
Chop the spinach roughly (it'll take a couple of minutes, giving the tomatoes time to cook) and put it into the saucepan on top of the spinach and tomato. Stir together and leave it to continue cooking.
The packets of gnocchi that we buy take about 2-3 minutes to boil: start them going now, in a separate pan, using the boiling water etc.
Put the pesto into the saucepan with the tomatoes etc. Mix it all together, and turn the heat right down to its lowest setting.
When the gnocchi are ready, drain them. Pour a tablespoon or so of olive oil over them, then mix them in with the sauce, and serve.