Heat a large skillet over medium-high heat. Add the ground beef and cook, breaking it apart with a spatula, until browned and no longer pink. Season lightly with salt and pepper.

Add the diced onion, bell pepper, and minced garlic to the skillet. Cook for 3–5 minutes, stirring often, until the vegetables soften and the moisture begins to evaporate.

Add the sugar-free ketchup, tomato paste, mustard, Worcestershire (optional), apple cider vinegar, sweetener, smoked paprika, salt, and pepper. Stir well to combine everything into a rich sloppy joe sauce.

Reduce the heat to medium-low and let the mixture simmer for 5–7 minutes. This thickens the sauce and intensifies the flavors.

If using cauliflower rice, stir it in now and cook 2–3 minutes to evaporate extra moisture.

Taste and adjust seasoning — add a little extra sweetener or vinegar if you want a more classic sloppy joe balance.

Transfer the mixture to a baking dish and spread it evenly. Use an 8×8 dish for a thicker casserole or a 9×13 dish for a thinner layer with a crispier top.

Sprinkle the shredded cheddar cheese evenly over the top. Add chopped turkey bacon if you’d like extra protein and crunch.

Bake at 375°F (190°C) for 12–15 minutes, or broil for 2–4 minutes until the cheese is melted, bubbly, and golden brown.

Let the casserole rest for 5 minutes to thicken before serving. Scoop generous portions and enjoy every cheesy, tangy bite.