Make the seasoning salt and fry sauce. In a small bowl, add the seasoning ingredients and stir to combine. In a medium bowl, add the sauce ingredients and stir until smooth and combined.
Preheat the oven to 400°F on the air fryer setting. Line two large baking sheets with parchment paper.
Arrange the assorted frozen fries in a single layer on the parchment-lined baking sheets. Distribute fries across the two baking sheets based on thickness (i.e. cook time). For example, onion rings, tater tots, wedges, and curly fries are thicker and will take longer to cook than shoestring or waffle fries.
Bake for 10-20 minutes, until hot and crispy, turning halfway. After 10 minutes, check the fries every few minutes as some varieties will cook quicker than others. Tater tots will take an additional 5 minutes (about 25 minutes total).
Meanwhile, transfer the fry sauce to a small dipping bowl and arrange (along with any other dips) on your serving platter.
Once each type of fry is cooked, immediately transfer them to a large bowl. Sprinkle with seasoning salt and toss to coat. Transfer to the prepared serving platter. Serve while hot.
Notes
Storage: Store cooked fries in an airtight container in the refrigerator for up to 2 days. To reheat them, arrange them in a single layer on a parchment-lined baking sheet and air fry at 400°F for 5-10 minutes, until hot and crispy.More dip recipes: It's nice to serve an assortment of dips when serving a variety of fries. Here are a few of my favourite dip recipes:
Garlic mayo: ½ cup mayonnaise + 2 minced cloves garlic + 2 teaspoons lemon juice + ¼ teaspoon salt
Honey mustard dip: ¼ cup mayonnaise + 3 tablespoons yellow mustard + 1 tablespoon honey + 1 pinch salt
Hot mustard dip: ¼ cup mayonnaise + 3 tablespoons yellow mustard + 1 tablespoon hot sauce + ¼ teaspoon cayenne pepper + 1 pinch salt
Ranch dip: ½ cup mayonnaise + 2 tablespoons milk + 1 teaspoon dried parsley + ½ teaspoon onion powder + ½ teaspoon garlic powder + ½ teaspoon dried chives + ¼ teaspoon ground mustard + ¼ teaspoon salt
Elote dip: 3 tablespoons mayonnaise + 1 tablespoon lime juice + 1 minced clove garlic + 1 teaspoon chili powder + 1 pinch salt