Mesclun is the French term for a mix of salad greens. The traditional mesclun mix contains various tender lettuces such as chicory, arugula and endive. Sprinkle the seeds over the top of the soil, aiming to get them about 1" apart. Cover the seeds with 1/4" of potting soil. Water well.
In a matter of weeks, the container should be covered with tender green plants. To harvest, snip heads of lettuces at soil level to create more room for nearby heads. Lettuce heads will continue to grow new leaves, so harvest just the outer leaves of the heads that remain after thinning.