Prep the peppers: Heat oven to 400°F (200°C). Slice a thin piece off the bottom of each pepper so they stand upright. Place in a baking dish, spray lightly with oil, and season with a pinch of salt and pepper.
Par-bake: Bake peppers for 10–12 minutes to soften slightly while you make the filling.
This keeps them tender but not soggy.
Cook the beef: Warm a large skillet over medium heat. Add a mist of oil, then the onion. Sauté 3–4 minutes until translucent.
Stir in garlic for 30 seconds. Add ground beef, breaking it up as it browns, about 5–7 minutes.
Season: Drain any excess fat if needed. Stir in smoked paprika, onion powder, garlic powder, Worcestershire, salt, and pepper.
Cook 1 minute to bloom the spices.
Add the “burger” elements: Reduce heat to low. Mix in ketchup, mustard, chopped pickles, Greek yogurt, and the cooked rice or cauliflower rice if using. Fold in 1/2 cup shredded cheddar until just melted.
Taste and adjust seasoning.
Stuff and top: Spoon the filling into the par-baked peppers, packing it down gently. Sprinkle a little extra cheddar over each pepper.
Bake: Return to the oven for 12–15 minutes, until the peppers are tender and the cheese is melted and golden on top.
Finish and serve: Let rest 5 minutes. Garnish with extra chopped pickles, shredded lettuce, diced tomatoes, or a light drizzle of mustard and ketchup.
Serve hot.