Preheat oven to 400°.
To prepare shrimp, coat a baking sheet with cooking spray. Place prepared pan in 400° oven for 10 minutes.
Combine panko, 1/4 teaspoon garlic powder, onion powder, and salt in a shallow dish, stirring with a whisk. Place egg white in another shallow dish. Dip shrimp in egg white, and dredge in panko mixture. Place on preheated baking sheet. Bake at 400° for 10 minutes or until done.
To prepare sauce, combine mustard and the remaining ingredients. Serve sauce with shrimp.