Heat a medium saucepan over medium heat, add the oil and heat through. Sauté the garlic until fragrant, about 30 seconds. Add the maple syrup, chipotles and adobo, tomatoes, vinegar, soy sauce and mustard to the pan. Simmer until the sauce starts to come together, about 10 minutes.
Remove from heat and let cool slightly, then blend until smooth. Set aside until ready to use or refrigerate in an airtight container for up to 1 week.
For the wings:
Preheat oven to 250ºF (130ºC). Let the wings stand at room temperature for 30 minutes, so that the wings cook evenly.
Fill a large heavy-bottomed pot with enough oil to reach 2” (5cm) up the side of the pot. Heat oil to 375°F (190ºC). In a mixing bowl toss the wings with the cornstarch and season with salt and pepper.
When the oil is hot, working in batches, lower the wings into the oil and fry, turning occasionally, until the chicken is cooked through and the outside is golden brown, about 10 minutes.
Transfer to a wire rack set over a baking sheet to drain. Place the rack in the oven to keep warm and repeat with the remaining wings.
Add the fried wings to a large mixing bowl and toss with the sauce until evenly coated. Transfer to a platter or plate and serve immediately.
Notes
Baking is a great option. Preheat your oven to 400°F (200ºC), place wings on a wire rack for airflow (or foil-lined sheet for cleanup), and bake for about 35 minutes, flipping once before broiling for an extra crispy finish.