Sticky Orange Chicken with Caramelized Onions and Fennel

Ingredients

• ½ cup (120 ml) toasted sesame oil
• 2 tablespoons grated orange zest plus ½ cup (120 ml) fresh orange juice
• 6 tablespoons (90 ml) tamari
• 1 tablespoon fresh lime juice
• 2 tablespoons grated fresh ginger
• 3 garlic cloves, minced
• 3 pounds bone-in, skin-on chicken thighs
• 2 large yellow onions, thinly sliced
• 2 fennel bulbs, cored and thinly sliced, plus fronds, chopped, for garnish