Heat your oven to 400 degrees Fahrenheit

Heat a 12-inch cast iron skillet over medium heat for 3 minutes

Add in oil and heat it until it simmers

Add onion and ½ teaspoon salt and ¼ teaspoon pepper (cook until onions are softened and lightly browned - should be about 5 to 7 minutes)

Stir in the garlic and pepper flakes and cook until fragrant (should be about 30 seconds)

Add the ground turkey, break it up with a wooden spoon or spatula, and cook it through until it is no longer pink (should be about 5 minutes)

Stir in a jar of tomato sauce

Add ½ cup of water to the jar and shake to clean the jar of sauce (pour this into the pan)

Bring to a simmer and cook until the sauce is slightly thickened (should be about 10 minutes)

Transfer to the bowl except for a thin layer (about a cup of sauce should be remaining)

In a separate bowl you will combine the ricotta, egg, complete seasoning, ½ teaspoon salt, and ½ teaspoon pepper

Stagger 7 noodle halves around the edge of the skillet and place 1 noodle half in the center

Dollop ⅓ of ricotta mixture over the noodles (top with ¼ cup of cheese and a heaping cup of sauce from remaining sauce

Repeat this layering process 2 more times with the noodles, ricotta sauce, cheese, and then meat sauce

Top with the remaining cheese (should be about 1 ½ cups)

Transfer skillet to the oven, bake until cheese is golden brown, and lasagna is bubbling around the edges (should be about 30 minutes)

Let the skillet lasagna cool for about 10 minutes before serving it