01 -
Generously season beef cubes with salt and black pepper on all sides. Allow to rest at room temperature for 10 minutes for even cooking.
02 -
Melt butter over medium-high heat in a cast iron skillet until foam appears. Add minced garlic and stir continuously for 30 seconds until fragrant without browning.
03 -
Add steak cubes in a single layer without overcrowding. Cook undisturbed for 2-3 minutes to develop crust, flip and cook another 1-2 minutes for medium-rare or longer as preferred.
04 -
Boil a large pot of heavily salted water. Cook pasta shells al dente according to package instructions (8-10 minutes). Reserve 120 ml pasta water before draining.
05 -
Simmer heavy cream over medium heat until gentle simmer. Gradually whisk in Parmesan until smooth. Adjust thickness with reserved pasta water if necessary.
06 -
Stir drained pasta shells into Alfredo sauce to coat evenly. Simmer together for 1 minute to allow flavors to meld.
07 -
Serve pasta topped with garlic butter steak bites, allowing butter to drizzle over. Garnish with fresh chopped parsley and extra Parmesan if desired. Serve immediately.