Pat the steaks dry with paper towels and season both sides generously with salt and pepper.
Heat olive oil in a large cast-iron skillet over medium-high heat until just smoking.
Place steaks in the skillet and sear for 4-5 minutes per side for medium-rare, or until desired internal temperature is reached.
Remove steaks from the skillet and transfer to a plate to rest for at least 5 minutes.
In the same skillet over medium heat, melt 1 tablespoon of butter and add the shrimp in a single layer.
Cook shrimp for 1-2 minutes per side until pink and opaque, then remove and set aside.
Add the remaining tablespoon of butter and the minced garlic to the skillet, sautéing for 30 seconds until fragrant.
Pour in the heavy cream and bring to a gentle simmer, scraping up any browned bits from the bottom of the pan.
Stir in the Parmesan cheese until the sauce thickens slightly.
Return the shrimp to the pan and toss in the sauce to coat.
Spoon the shrimp and garlic cream sauce over the rested steaks and garnish with chopped parsley.