This Cheeseburger Pie is filled with hearty beef, grilled onions and cheese, and it comes together quickly and easily on a busy weeknight! The whole family will LOVE it!
To make, preheat the oven to 400 degrees F. Spray a pie dish with cooking spray. You could also use a 8×8-inch dish here or double the recipe and use a 9×13-inch.
Spray a large skillet with cooking spray and add the onion, mushrooms, and garlic. Cook on medium heat for 3-4 minutes, or until onions and mushrooms are tender.
In a separate bowl, add the egg, milk and Bisquick. Whisk just until combined. It’s ok if some small lumps remain. Over-mixing can make the texture tough, and we want fluffy!