Instructions:
1. Brown ground chuck and chopped onion in 1 tablespoon oil over medium heat
until meat reaches 160°F on a meat thermometer.
2. Drain and pour into slow cooker. Combine remaining ingredients and pour over meat mixture.
Stir to mix.
3. Cook on high for 3 to 3 ? hours or low for 6 to 8 hours. Serve on hamburger buns.
Courtesy of justslowcooking.com