Pat the chicken tenders dry with paper towels.
Set up 3 shallow bowls. In one bowl, add the arrowroot starch, cassava flour, salt, garlic powder, oregano, and a few grinds of black pepper. Use a fork to mix and combine. In the second bowl, add the eggs, Dijon, and about a tablespoon of water. Whisk to combine. In the last bowl, add the panko, salt, and paprika. Mix to combine.
Working one tender at a time, add the tender to the flour mixture, shaking off any excess, then, using the opposite hand, add it to the egg mixture, allowing excess egg to drip off. Finally, coat in the panko breadcrumbs, shake off the excess, and set on a clean plate. Repeat until all tenders are coated.
In a large skillet with tall sides, add about 3 tablespoons of avocado oil. Heat over medium-high heat until it is hot.
Once hot, add half of the tenders. Reduce the heat to medium, and brown on one side, undisturbed, for 2 to 3 minutes, or until a deeply golden-brown crust forms. Flip, and cook for an additional 2 to 3 minutes.
Transfer to the sheet pan with the wire rack and repeat with the remaining tenders, adding additional oil as needed.
Prior to transferring to the oven, using a rubber pastry brush, brush the chicken tenders with the remaining honey mustard dressing. If you like a little extra sweetness, you can drizzle them with an extra tablespoon of honey (or hot honey!), too.
Transfer to the oven and bake for 5 to 7 minutes, or until the chicken registers at least 165°F.
Remove from the oven, season with a pinch of flaky salt, and allow them to rest while you make the salad.