Preheat the broiler. Lightly grease a baking sheet and set aside.
Pick stems from the spinach; discard bad leaves. Wash the spinach in several changes of water. Place the wet spinach in a large saucepan and cook, uncovered, over medium-low heat until wilted. Drain the spinach and set aside until cool enough to handle. Squeeze out excess water, coarsely chop, an