1 tbsp oil
1 cup diced onion
2 cloves garlic minced
2 15 oz pinto beans, drained and rinsed
2 15 oz cans kidney beans, drained and rinsed
2 15 oz cans cannellini beans, drained and rinsed
2 12 oz bottles root beer (like IBC Root Beer)
1/2 cup apple cider vinegar
1/2 cup ketchup
3 tbsp brown sugar
2 tbsp dijon mustard
2 tsp chili powder
1 1/2 tsp kosher salt
1 tsp ground black pepper