Heat an oven safe skillet over medium heat. Add the pancetta and cook through. Add the garlic and cook until fragrant.
Move the pancetta and garlic to the sides of the pan leaving a hole in the middle. Place the feta block in the center. Place the tomatoes all around the block of feta. Sprinkle olive oil, red pepper flakes, salt, pepper, and parsley over the feta and tomatoes.
Bake at 400 degrees for 30 minutes.
While the feta is baking, cook your pasta. Reserve one cup of pasta water before draining. Remove the skillet from the oven and stir the contents around, breaking the feta up and crushing the tomatoes. Add the cup of pasta water, spinach, basil, and parmesan cheese. Stir well.
Add pasta to the sauce and stir to combine. Serve immediately.