As always, investors need to watch the business and not the stock.It's been a disappointing journey for shareholders of plant-based meat company Beyond Meat (BYND -0.14%). Shares are down 96% from their all-time highs in 2019. It was a disappointing journey -- that is, until things started getting interesting over the last month.In just one month, Beyond Meat stock is up 34%, outpacing the 2% return for the S&P 500. It's one of the best performances the stock has had in a long time. Could the outlook for sh ...