Shake Shack is still a growth stock, and it offers a lot of potential upside.Cava Group (CAVA 1.57%) has been one of the hottest restaurant stocks to own this year. As of Nov. 12, the stock is up a mammoth 237%, wildly outperforming the S&P 500, which is by no means having a bad year with its year-to-date gain of 25%.However, investors may be concerned the stock is approaching its peak with a valuation that's just too rich. Cava trades at nearly 300 times its projected fiscal 2025 earnings (based on analyst ...