Prep the steak: For clean, thin slices, place the steak in the freezer for 20–30 minutes first.
Slice against the grain into very thin strips. Pat dry and toss with 1/2 teaspoon salt, black pepper, smoked paprika, and Italian seasoning.
Warm the base: If using cauliflower rice, sauté in a little oil with a pinch of salt until tender. For rice or quinoa, reheat with a splash of water.
Keep covered and warm.
Sauté the veg: Heat 1 tablespoon oil in a large skillet over medium-high. Add onions and peppers with a pinch of salt. Cook 6–8 minutes, stirring occasionally, until softened and lightly browned.
Stir in garlic for 30 seconds. Transfer to a bowl.
Sear the steak in batches: Add the remaining oil to the hot skillet. Spread steak in a single layer.
Sear 1–2 minutes per side until browned but still tender. Don’t crowd the pan. Work in 2–3 batches if needed.
Combine and season: Return all steak and the pepper-onion mix to the skillet.
Add Worcestershire and toss. Taste and adjust salt and pepper.
Add the cheesy finish: Lower the heat. Stir in cream cheese or a spoonful of Greek yogurt if using, just until it melts and coats the mixture.
Lay provolone or sprinkle mozzarella over the top and cover for 1–2 minutes until melted.
Assemble the bowls: Spoon your warm base into bowls. Top with a generous scoop of the steak-pepper mixture. Garnish with parsley and a few pickled jalapeños if you like heat.
Serve: Enjoy right away while the cheese is melty and the steak is tender.