Prepare the Marinade: In a small bowl, whisk together the maple syrup, Dijon mustard, whole grain mustard, olive oil, minced garlic, soy sauce, and lemon juice until well combined.
Marinate the Salmon: Place the salmon fillets in a shallow dish or a resealable plastic bag. Pour the marinade over the salmon, making sure each fillet is well-coated. Allow the salmon to marinate in the refrigerator for at least 30 minutes, or up to 2 hours for maximum flavor.
Preheat the Air Fryer: Preheat your air fryer to 400°F (200°C) for about 5 minutes. This step ensures a nice sear on the salmon.
Prepare the Salmon for Air Frying: Remove the salmon from the marinade, letting any excess drip off. Season both sides with a pinch of salt and pepper. Arrange the fillets in the air fryer basket, skin side down, ensuring they are not touching to allow for even cooking.
Air Fry the Salmon: Cook the salmon in the preheated air fryer for 8-10 minutes, depending on your desired level of doneness. The salmon should be flaky and cooked through, with a nice caramelized glaze.
Adjust Seasoning: Once cooked, taste and adjust seasoning if needed. Garnish with fresh herbs and serve with lemon wedges for an extra zing.
Serve and Enjoy: Plate the maple mustard glazed salmon with your favorite side dishes, such as steamed vegetables or quinoa, and enjoy your delicious air-fried meal!