Preheat the air fryer: Set to 375°F (190°C).
Line the basket with a small piece of foil or a parchment liner for easy cleanup.
Prep aromatics: Toss jalapeño halves and unpeeled garlic cloves with olive oil. Place them cut side down in the air fryer basket.
Air fry: Cook for 6–8 minutes until the jalapeño skins blister and the garlic softens. Let cool slightly.
Peel the garlic.
Blend base: In a blender or food processor, add cilantro, yogurt (or mayo/sour cream), lime zest and juice, roasted jalapeño, and peeled garlic.
Season: Add cumin, salt, and a few grinds of pepper. If using avocado or a touch of honey, add them now.
Blend until smooth: Pulse, then blend on high until creamy. Add 1–2 tablespoons water to reach your preferred consistency.
Taste and adjust: Add more lime for brightness, salt for punch, honey for balance, or a splash more water to thin for drizzling.
Serve: Use right away or chill for 30 minutes to let the flavors settle.