Step 1

In a mixing bowl, combine the brown sugar, mustard, garlic and mix together

Step 2

Add juice of two limes and two lemons, leaving skins in bowl.

Step 3

Add vinegar and mix together

Step 4

Drizzle olive oil in slowly while whisking mixture together.

Step 5

Place chicken breast in marinade and cover. Refrigerator overnight (or for at least 2 hours).

Step 6

Remove chicken from marinade and grill it until fully cooked (about 6-8 minutes per side).