Season the 4 skinless boneless chicken breasts with a good pinch of Kosher salt and pepper and place into a ziplock bag.
In a small jug, whisk all the remaining ingredients (3/4 cup light mayonnaise, 1/2 cup finely shredded Parmesan, 1/4 cup fresh lemon juice, 1 tablespoon Dijon mustard, 2 teaspoons maple syrup or honey, 1 teaspoon Italian seasoning, and a few spears of fresh thyme) except for the olive oil. Pour 1/2 of the sauce over the chicken and stir through the bag. Reserve the remaining half to use as a dip (make sure it doesn't touch the raw chicken).
Marinate chicken for 30 minutes over the counter. Meanwhile, preheat the oven to 375 F and lightly grease an oven-safe dish with 1 tbsp olive oil or avocado oil.
Transfer the marinated chicken to an oven-safe dish.
Bake for 35-45 minutes, or until the internal temperature reads 165F.
Slice and serve with remaining sauce.
Video
Notes
Serving size: one chicken breast
Chicken: use lean chicken breasts with fat trimmed off. If you prefer chicken thighs, you can use that instead. Make sure they are boneless and skinless. Cooking time will vary. Cuts down to 20-30 minutes.
Cooking time varies depending on the thickness of the chicken breast. It is best to use a food thermometer to check the internal temperature until it reaches 165F.
Honey can be used in place of maple syrup.
You can use any other seasoning of choice instead of the Italian seasoning, but that's the seasoning I recommend.