Slow Cooker Parmesan Honey Pork Roast

1 (3 – 4 pound) boneless pork roast
⅔ cup grated Parmesan cheese (yes, the powdered kind in the shaker canister)
½ cup honey
3 tablespoons soy sauce
1 tablespoon dried basil
2 tablespoons minced garlic
2 tablespoons olive oil
½ teaspoon salt

For Thickening Sauce
2 tablespoons cornstarch
¼ cup cold water