Preheat oven to 400°F. Spray a 9×13-in. baking dish with cooking spray
and set aside.
In a skillet, brown and crumble the beef with the onion & salt until meat is no longer pink. Drain the meat. Add the Sriracha and mustard.
Spread into the prepared pan. Top with cheese.
In a medium bowl, combine the Bisquick, milk, and eggs with a wire whisk or a fork until thoroughly combined. Pour evenly over the top of the cheese. Sprinkle with sesame seeds.
Bake 25-30 minutes or until a knife inserted near the center comes out clean.
