Prep the pork: Pat the pork cubes very dry with paper towels. Dry meat browns better and helps the Parmesan cling.
Season generously: In a large bowl, toss pork with 2 tablespoons oil, minced garlic, onion powder, paprika, red pepper flakes, Italian seasoning, salt, and pepper until evenly coated.
Add Parmesan: Sprinkle the grated Parmesan over the seasoned pork and toss again to create a light, even coating.
It should cling like a crust.
Preheat the pan: Heat a large heavy skillet (cast iron works best) over medium-high heat. Add the remaining 1 tablespoon oil.
Sear in batches: When the oil shimmers, add pork in a single layer without overcrowding. Let it sear undisturbed for 2–3 minutes to form a golden crust, then flip and cook another 2–3 minutes.
Aim for caramelized edges and juicy centers. Repeat with remaining pork.
Finish with butter and lemon: Reduce heat to medium-low. Return all pork to the skillet.
Add butter and let it melt, stirring to coat. Splash in lemon juice for a subtle brightness. Taste and adjust salt and pepper.
Rest briefly: Transfer pork to a plate and rest 3–5 minutes so juices settle.
Assemble meal prep: Divide pork into 4–5 containers.
Add your chosen low-carb side, like roasted broccoli or cauliflower rice. Garnish with parsley if you like.