Preheat the oven to 400°F (200°C).
Place the tomatoes, jalapeño, onion, and garlic on a baking sheet.
Roast in the preheated oven for about 20 minutes or until the vegetables are slightly charred.
Remove from the oven and let cool slightly.
Peel the garlic and transfer all the roasted vegetables to a blender or food processor.
Add the cilantro, lime juice, and salt.
Blend until you reach the desired consistency.
Taste and adjust seasoning if necessary.
Serve immediately or store in the refrigerator for later use.