Place a rack (if using) on a sheet pan. Spread the chicken evenly across the rack. Sprinkle 1/2 Tbsp of salt across one side of the chicken pieces. Then flip the chicken over and sprinkle the other 1/2 Tbsp of salt across the other side. Slide the pan of chicken into the fridge.
If brining, let the chicken sit for up to 8 hours in the fridge.
Place a piece of silpat or parchment paper on a second sheet pan. Toss the prepared vegetables and garlic into a large bowl along with 2 Tbsp of extra-virgin olive oil and 2 tsp of kosher salt. Stir to combine. Spread the vegetables evenly across the sheet pan.
When ready to cook, place one rack in the lower third of your oven and the other rack in the upper third. Preheat the oven to 375F.
Once the oven is heated, slide the vegetables onto the lower rack and the chicken onto the upper rack.
After 15 minutes, remove the chicken, flip the pieces, and return to the oven. Cook for another 10-15 minutes. It's done when a thermometer reads 165F after being inserted into the thickest piece of chicken.
(Optional) Once the chicken's done, move the vegetables to the top rack and cook for another 10-15 minutes. The extra time will create more browning, which will improve the flavor.
Let everything cool, then place into glass storage containers and keep in the fridge for up to a week.