Preheat oven to 400F Convection Bake.
Start by marinating your chicken. In a large bowl, whisk together olive oil, lemon juice, Dijon mustard, salt, and pepper. Add the thinly sliced cutlets and toss to coat. Let it sit for 15–30 minutes.
While the chicken marinates, prepare two separate bowls. In one, mix together all the breadcrumb ingredients: panko, Parmesan, salt, pepper, garlic powder, onion powder, and dried parsley. In the other, stir together the Greek yogurt, salt, pepper, and milk until smooth.
Line a baking sheet with parchment paper and, if you have one, place a baking rack on top for even crisping.
Working one at a time, dip each cutlet into the yogurt mixture, then press both sides into the breadcrumb mixture until fully coated. Place onto your prepared baking sheet and lightly spray the tops with olive oil spray.
Bake for 9 minutes, then flip each cutlet, spray again, and return to the oven for another 9 minutes or until the chicken is cooked through and crispy (internal temp should be 165°F).