Golden Cheese Steak Tortellini Casserole Step-by-step instructions

Before you start

Before beginning, ensure all ingredients are measured and ready to go. Chop the steak into uniform, bite-sized pieces to ensure even cooking. Grate the mozzarella cheese if using a block, and have the baking dish lightly greased to prevent sticking.

Preheat the oven to 375°F (190°C) so it is ready for the final assembly. Having all components prepped and the workspace clean allows for a smooth transition between searing the meat and assembling the final casserole.

Instructions

Searing the steak

1. 1Sear the steak
   Heat a large skillet over medium-high heat. Add the bite-sized sirloin steak pieces and sear until browned on all sides. Ensure the steak reaches an internal temperature of 145°F (63°C) and let it rest for at least 3 minutes before proceeding.
   Look for The steak should be well-browned and fragrant.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Do not overcrowd the skillet to ensure a good sear on the meat.

The steak should be deeply browned on the exterior, with a noticeable crust forming in the skillet. The aroma of seared beef should be prominent, indicating that the flavors have been developed.

Ensure the meat is cooked to the safe internal temperature of 145°F (63°C) before moving on to the next step, as this is the primary flavor base for the dish.

Preparing the pasta

2. 2Prepare the pasta
   Cook the cheese tortellini according to the package instructions until al dente. Drain well. In the same skillet used for the steak, combine the cooked tortellini and the seared steak pieces.
   Look for The pasta should be tender yet firm.
   Tip Drain the pasta thoroughly so the sauce does not become watery.

The tortellini should be cooked until al dente, maintaining a slight bite. Drain the pasta thoroughly to ensure the final casserole does not become watery or lose its structure. Check that the pasta is evenly combined with the seared steak pieces, ensuring a balanced distribution of ingredients before transferring the mixture into the baking dish.

Baking the casserole

3. 3Assemble and bake
   Transfer the mixture into a dark square baking dish. Top with the mozzarella cheese. Bake in a preheated oven until the cheese is bubbly and golden brown.
   Look for The top should be melted, bubbly, and golden.
   Tip Watch the oven closely to prevent the cheese from burning.

The casserole is finished when the top layer of mozzarella has melted into a beautiful, golden-brown crust. The edges of the dish should show bubbling, indicating that the heat has penetrated the center of the casserole. The dish should smell savory and cheesy, with the steam rising from the center, signaling it is ready to be removed from the oven.

Common mistakes

A common mistake is failing to properly sear the steak, which leaves the meat tasting boiled rather than savory. Another error is overcooking the tortellini before it goes into the oven; keep the pasta slightly firm, or al dente, because it will continue to cook in the hot oven.

Finally, using poor quality cheese can cause the topping to remain oily or fail to melt into a cohesive, golden layer.

How to tell it’s done

The casserole is done when the internal temperature of the steak pieces has reached at least 145°F (63°C) and the cheese topping is golden and bubbling.

The dish should be heated through, not pooling at the bottom of the dish. If the cheese browns too quickly before the center is hot, cover the dish loosely with foil for the final few minutes of baking to protect the surface.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest