Put the breadcrumbs, cornstarch, garlic salt, pepper, onion powder, paprika, parsley, and thyme into a large Ziplock freezer bag. Mix this well. Then add 1 tablespoon of olive oil and mix until the whole mixture is a sandy texture.
Pour the remaining olive oil into a shallow bowl or plate and coat each piece of chicken.
Add the chicken pieces to the bag, one at a time. And squish it around to coat the chicken well. (If you love thicker breading, repeat this step - coat again in oil, then add to the bag of shake and bake mix)
Place the chicken on a foil-lined baking sheet. (Use 2 pans if necessary, we don’t want to crowd the chicken.)
The boneless chicken will need to be baked for about 45 minutes. The chicken is fully cooked when the internal temperature is 165 degrees.
Remove from the oven and place chicken on a cooling rack if you prefer the chicken not to get soggy on the bottom while resting. The juices released while cooking sits underneath the chicken on the baking sheet.
Notes
Store any leftover cooked chicken in an airtight container for up to 1-2 days.