Prep the cauliflower rice: If using fresh cauliflower, cut into florets and pulse in a food processor until it resembles rice. Don’t over-process.
Pat dry with paper towels to reduce moisture.
Brown the pork: Heat the oil in a large skillet over medium-high heat. Add the ground pork, season lightly with salt and pepper, and cook, breaking it up with a spatula, until browned and crumbly, about 6–8 minutes. Drain excess fat if needed.
Sauté aromatics: Push the pork to one side.
Add onion, garlic, and ginger to the empty space. Cook 2–3 minutes until fragrant and softened, then mix together with the pork.
Add vegetables: Stir in bell pepper and peas. Cook 2–3 minutes until crisp-tender.
Keep the heat medium-high to prevent steaming.
Add cauliflower rice: Spread the cauliflower over the skillet. Let it sit for 1 minute to get some contact with the pan, then stir. Cook 4–6 minutes until the “rice” is tender but not mushy.
Season: Pour in soy sauce, rice vinegar, and sesame oil.
Add red pepper flakes if using. Toss to coat evenly and cook 1–2 minutes to let flavors mingle.
Finish and taste: Remove from heat. Squeeze a wedge of lime over the skillet.
Taste and adjust salt, pepper, or soy as needed.
Garnish and serve: Top with scallions and sesame seeds. Serve with extra lime wedges.