Preheat the oven to 210C/425F. Season the chicken thigh fillets with salt and pepper and set aside.
In a large bowl, whisk together the olive oil, soy sauce, Dijon mustard, honey, brown sugar, and garlic. Transfer the mixture to a large ziplock bag, then add the chicken thighs 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 chicken thighs from the oven and serve immediately.
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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.Tips for choosing chicken thighs
Buy frozen chicken thighs. Often cheaper than fresh thighs, they taste identical once thawed and seasoned.
Look for the freshest chicken. Fresh chicken thighs should be pink or flesh-colored with clear and uneven skin. If there's any grey or limp skin, give it a miss.