Domino's has proven that pizza can be more than comfort food -- it can be a compounding machine.Domino's Pizza (DPZ -0.95%) may be best known for its 30-minute delivery promise, but for investors, it has quietly become one of the most consistent value creators in the restaurant industry. Over the past two decades, Domino's has not only built a global footprint of more than 21,000 stores but also rewarded investors with market-beating returns.The key question today is: What makes Domino's such an effective c ...