Blend eggs, cream cheese, salt, garlic powder, and pepper in a blender.
Grease an 8x8 pan with butter and pour the mixture into it.
Bake at 325°F for 8 minutes until just set.
Let it cool for about 5 minutes.
Gently release the pasta sheet from the pan with a spatula.
Roll it up and slice into 1/8 inch thick slices.
Unroll gently and set aside.
In a small bowl, combine mascarpone, parmesan cheese, and butter. Microwave for 30 seconds, then whisk. Microwave for another 30 seconds and whisk until smooth.
Toss the pasta in the hot sauce and serve immediately, optionally with more black pepper.