Mix marinade ingredients (buttermilk, marmalade, soy sauce) in a medium bowl. Add the chicken tenders to the marinade and stir to coat completely with the marinade. Cover with plastic wrap and chill in the refrigerator for 30 minutes to an hour (or longer).

While the chicken is marinating, prepare the breading. Heat a medium sized thick-bottomed skillet on medium high heat. Add the breadcrumbs to the dry hot pan and spread them so they are in an even layer in the pan. Lower the heat to medium and stir frequently until the breadcrumbs begin to brown. Once you can see visible browning, stir in the raw sesame seeds. Continue to cook in the pan, stirring frequently until the mixture is a deep golden color. Remove from heat. Stir in the olive oil and the salt and stir until all of the breadcrumbs and sesame seeds are lightly coated with the oil.

Preheat oven to 200°C. Line a roasting with aluminum foil and place a baking rack on top. Brush or spray the rack with a little cooking oil. Place the toasted breadcrumb mixture in a shallow bowl for dredging. Remove the chicken fillets one at a time from the marinade (do not wipe off the marinade) and dredge them in the bread crumb mixture. Place them on the prepared rack on the roasting pan.

Bake chicken tenders at 200°C for 15 minutes. Remove from oven and let cool for 5 minutes before serving

While the chicken is baking, prepare the dipping sauce. In a small bowl stir together the orange marmalade, soy sauce, hot sauce, and seasoned rice vinegar.

Serve sesame chicken fingers with the spicy orange dipping sauce.