Add all ingredients (except toppings) to the slow cooker. Cook on low for 8-10 hours. Taste and add additional salt and pepper if desired. Serve with assorted optional toppings. That's it!
*Jalapeño peppers can vary greatly in heat level. What I usually do is cut into one and taste the flesh. If it's on the sweeter side (almost bell pepper-like), I'll add the whole thing, seeds and all. If it's tongue-burning hot, I'll just chop up half and omit the seeds altogether. Go with what you're comfortable with, heat-wise!