Prep your base: Cook rice, quinoa, or cauliflower rice according to package directions. Keep warm.
Sauté aromatics: Heat olive oil in a large skillet over medium. Add onion and bell pepper.
Cook 5–6 minutes until softened and lightly golden. Stir in garlic and cook 30 seconds until fragrant.
Brown the chicken: Add ground chicken, salt, pepper, smoked paprika, and chili powder. Break it up with a spatula and cook 5–7 minutes until no longer pink and lightly browned in spots.
Build the sauce: Stir in ketchup, tomato sauce, tomato paste, brown sugar, Worcestershire, vinegar, and mustard.
Add the chicken broth and mix well to coat everything.
Simmer and thicken: Reduce heat to medium-low and simmer 6–10 minutes, stirring occasionally, until the mixture thickens and turns glossy. If it looks dry, add a splash more broth. Taste and adjust seasoning with salt, pepper, or vinegar.
Assemble the bowls: Spoon the sloppy joe mixture over your warm base.
Top with green onions, pickles, shredded cheddar, or a pinch of red pepper flakes as you like.
Serve: Enjoy hot. The sauce will continue to thicken slightly as it cools, so keep extra broth on hand for loosening when reheating.