Step 1

Make chipotle sour cream: Stir together sour cream, chipotle, lime zest, and lime juice. Season to taste with salt and pepper. Set aside.

Step 2

Make chili: Cook beef in a large Dutch oven over medium-high heat 8 minutes or until beef crumbles and is no longer pink. Remove with a slotted spoon. Cook onion and next 2 ingredients in drippings for 7 minutes. Stir in chili powder and next 2 ingredients and cook 1 more minute. Stir in pumpkin and next 5 ingredients.

Step 3

Bring to a boil; reduce heat to low and simmer 20 to 25 minutes or until pumpkin is tender. Stir in cilantro and season to taste with salt and pepper. Serve with jalapeños and chipotle sour cream.