Melt butter in your empty pan over medium-high heat and add the garlic, stirring it into the butter for one minute before adding the zucchini, salt, and red pepper. Cook the zucchini, stirring from time to time, for 13 to 15 minutes. It will first let off a puddle liquid, the liquid will cook off, and the zucchini will become soft and concentrated. If the zucchini begins to brown, reduce the heat slightly. Stir frequently for 2 more minutes, chopping it down into smaller bits with the edge of your spoon or spatula, until it reaches an almost spreadable consistency.