Make your homemade keto pasta according to the directions and cut it into bite-sized squares. Set aside.
In a bowl mix together the parmesan cheese and ricotta cheese. Set aside until ready to use.
Using an oven-safe skillet (I used a cast-iron skillet) mix together your sauce on high heat. Let the sauce come to a simmer and then turn off the heat.
Next mix in your keto pasta. The pasta doesn't need to cook so this should only take a few moments to mix in. Then spread the cheese sauce over the top of the lasagna.
Place your skillet lasagna in the oven under the broiler/grill until the top of the cheese crisps and browns. Remove your skillet lasagna from the oven and serve.