||For Glaze: In a small skillet, warm apricot jam and 1 1/2 tablespoons apple cider vinegar over medium heat until well combined. Add balsamic vinegar, bringing mixture to a boil before reducing flame to low. Allow ingredients to simmer for 1-2 minutes, then transfer mixture into a heat resistant dish. Whisk in remaining apple cider vinegar, then water, until a dressing-like consistence is achieved. Set aside.
||Pre-heat oven to 400°F. Place a single layer of frozen chicken on a well greased baking sheet, making sure that chicken is spaced evenly. Bake chicken on the middle oven rack for 15 minutes until crispy and golden, then set aside to cool.
||While chicken cooks, thread skewers with a tomato, a spinach leaf, and a mozzarella ball. Once cool enough to handle, thread a piece of chicken to the end of each stick.
||Whisk glaze and drizzle over skewers. Plate and serve immediately, pairing with extra glaze on the side if desired.