McDonald's is taking a big step toward joining the meatless bandwagon. The chain said Thursday it will test a meatless burger in a partnership with Beyond Meat, reports Reuters. However, US patrons will have to wait to taste what's being called the "PLT"—plant, lettuce, and tomato—because the test will run in 28 restaurants in Ontario, Canada, starting on Monday. The burger, which costs the equivalent of $4.90 American, won't be 100% vegan, as it will be cooked on the same grill as regular burgers and topped with cheese, notes Business Insider. The news did wonders for Beyond Meat's stock, which shot up 16% in premarket trading before settling down to about 10% in the first hour of trading, notes MarketWatch. (Rival Burger King already has teamed successfully with Impossible Foods.)