When it comes to investing in restaurant stocks, investors are always on the lookout for the next Chipotle Mexican Grill (CMG 3.38%) or Starbucks (SBUX 2.44%), two of the biggest winners in the space over the past 15 to 30 years. These two stocks would have created a lot of millionaires out of investors who bought them in their early days as public companies and held on to the stocks.Let's look at two stocks that could follow these two iconic restaurants and be the next millionaire-making restaurant stocks. ...