Preheat the oven to 210C/425F. Season your chicken thigh fillets with salt and pepper and set aside.
In a large bowl, whisk together the olive oil, soy sauce, Dijon mustard, maple syrup, brown sugar and garlic. Transfer the mixture into a large ziplock bag, then add the chicken thighs to them and toss until combined.
Let the chicken marinate for at least 10 minutes.
Remove the chicken from the marinade and place them on a large baking sheet lined with tinfoil.
Bake for 20 minutes, before switching the oven to the broil setting so the sauce on top slightly thickens.
Remove the baked chicken thighs from the oven and serve immediately.
Notes
TO STORE: Leftovers can be stored in the refrigerator, covered, for up to 5 days.TO FREEZE: Place the cooled baked chicken thighs in an airtight container and store it in the freezer for up to two months.TO REHEAT: Either microwave the chicken for 30-40 seconds or in a preheated oven until hot.