Prep the veggies: Chop the cabbage, onion, peppers, celery, and carrots into bite-size pieces. Mince the garlic.
Sauté for flavor (optional): In a large pot, warm olive oil over medium heat.
Add onion, carrots, and celery. Cook 5–7 minutes until softened. Add garlic and peppers; cook 1 minute.
For an oil-free version, skip this and go straight to simmering.
Add the base: Stir in diced tomatoes, tomato paste, oregano, basil, smoked paprika, bay leaf, and a pinch of salt and pepper.
Load the cabbage and broth: Add chopped cabbage and pour in 6 cups broth to start. If you prefer it soupier, add up to 8 cups.
Simmer: Bring to a boil, then reduce heat. Cover and simmer 20–25 minutes, until cabbage is tender but not mushy.
Taste and finish: Remove bay leaf.
Adjust salt and pepper. Brighten with a squeeze of lemon and top with fresh parsley or green onions.
Serve: Enjoy hot. It’s great as-is or with a side of lean protein if you’re not strictly following a cleanse approach.