Step 1

In a large skillet, COOK the beef over medium-high heat, stirring with a wooden spoon, until browned, about 10 minutes.

Step 2

DRAIN off the fat.

Step 3

TRANSFER the beef to a 4- to 5-quart slow cooker. Add the onion, poblano pepper, sweet potatoes, tomato puree, crushed tomatoes, tomato juice, vinegar, chili powder, smoked paprika, cumin, garlic powder, allspice, cayenne, and salt to the cooker. Stir to combine.

Step 4

COVER and cook on low for 8 hours or on high for 4 hours.

Step 5

If desired, TOP servings with chopped onions.