Spray a 9x13-inch baking dish with nonstick cooking spray. Set aside.
In a large skillet over medium heat, melt butter.
Add beef cubes and sear all sides.
To the skillet with the beef, add beef broth, potatoes, carrots, peas, corn, onions, and bouillon. Stir to combine.
In a small bowl, combine cornstarch and milk. Slowly add this mixture to the skillet, stirring constantly. The mixture will thicken.
Add the final teaspoon of salt, garlic powder, and oregano. Simmer for 10-15 minutes.
Transfer to the prepared baking dish.
Top with the 8 biscuits.
Bake, uncovered, for 25-27 minutes, or until the biscuits are cooked through and golden brown.