Preheat the broiler and line a baking sheet with foil. Place tomatillos, whole garlic cloves, pineapple, and onion on the sheet. Broil for 10 minutes.

Flip the ingredients and continue broiling for an additional 5 minutes until charred.

Transfer charred ingredients to a blender or food processor. Add chipotle peppers and pulse briefly until a chunky mixture forms.

Taste and add salt as needed. Stir to combine and serve.