Preheat oven to 350°F. Coat a 9x9-inch baking dish with non-stick spray.
In a skillet, cook the sausage over medium heat until browned. Remove and drain on paper towels.
In a medium bowl, combine sausage, sour cream, cream cheese, Velveeta, Muenster, chives, Worcestershire, onion powder, and sage. Mix well.
Transfer mixture to prepared baking dish, spreading evenly.
Bake for 1 hour, until bubbly and golden. Serve warm.
Optional Slow Cooker Method: Combine all ingredients in a slow cooker and cook on high 1–2 hours until melted.
Serving Suggestions: Serve with tortilla chips, crackers, or vegetables.
Storage: Refrigerate up to 3 days; reheat in oven or slow cooker.