Check the product package for your chicken tenders and follow oven and time settings.
Different products require different amounts of time/temperature in the oven.
You can try other types of seasonings if you do not have seasoned salt. For example:
Mix
1 teaspoon onion powder with 1 teaspoon garlic powder and a pinch of salt and pepper.
1 teaspoon of garlic salt
½ teaspoon onion powder, ½ teaspoon dried thyme and 1 teaspoon garlic salt with a pinch of cayenne pepper.
If you are concerned with the oil, try spritzing your chicken strips with non stick cooking spray and then sprinkling with the salt and or herbs.