Soil blocking, a clever English invention, entails making compressed cubes from a well-wetted mix of peat moss and compost. This tool creates 2x2x2 inch cubes. Larger and smaller versions are available.
Seeds go into a divot created by the press, the tray goes in the cold frame, and nature does its magic.
This season, so far, I've done three rounds of soil blocks, with some of the seedling-sprouted blocks going directly into the garden and some (tomatoes, peppers, eggplant) getting repotted into recycled paper cups when the seedlings get to about 6" tall.
It's a remarkably efficient system that I'm trying for the first time this season.
I think it's a keeper.