Preheat oven to 375 degrees. Spray a baking sheet with nonstick spray and set aside.
Season chicken strips with salt and pepper. Set aside.
In a large bowl, combine honey mustard with egg substitute and whisk well. Submerge chicken in mustard-egg mixture, and set aside to marinate for at least 5 minutes.
Meanwhile, place pretzels in a sealable plastic bag, seal, and finely crush through the bag with a meat mallet or other heavy utensil. Add sugar, reseal, and shake to mix. Spread the mixture out on a large plate or in a large dish. Set aside.
Using tongs, transfer chicken strips to the pretzel-sugar mixture and thoroughly coat. Then transfer them to the baking sheet. (Discard excess mustard-egg mixture.) Mist the tops of the strips with nonstick spray. Bake in the oven for about 20 minutes, flipping chicken halfway through baking, until the chicken is cooked through.
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