Grilled Chicken Thighs (with the Best Marinade)

In a large bowl, whisk together the onion, garlic, ginger, pineapple juice, soy sauce, sugar, vinegar, and Asian sesame oil. Whisk until sugar is dissolved and marinade is well incorporated

Use paper towels to thoroughly pat-dry the chicken pieces. Place chicken in a single layer on a cutting board, place a sheet of cling wrap over the chicken, and pound to an even thickness*. Throw out cling wrap. Use a fork to pierce chicken pieces throughout. Lightly sprinkle chicken thighs on both sides with table salt

Place chicken in bowl of marinade. Toss to completely coat chicken pieces with marinade. Cover and chill overnight, or up to 3 nights total. Be sure to turn chicken pieces over halfway through, if all pieces aren't completely immersed in marinade

Grease and preheat grill at medium-high heat. Remove chicken from marinade* and grill just until center is no longer pink, taking care not to over-cook. It may take about 6-8 min per side, but actual cook time varies.Garnish as desired and serve immediately