Place bowls of chopped tomatoes, sour cream, and olives around so people can build their own nachos.

You could add chopped avocados, too; sprinkle them with some lemon juice to slow down browning.

In large skillet, cook pork sausage until partially done.

Add onions, garlic, and jalapeño pepper; continue cooking until sausage is thoroughly cooked.

Drain well.

Place in 2-quart slow cooker along with salsa, cheese, tomato, and chili powder.

Mix well.

Cover and cook on low for 6–7 hours, stirring once during cooking time.