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Export 10 ingredients for grocery delivery
Step 1
Place the garlic, broth, tomato paste, diced tomatoes, onion, and lemon juice into a 4-quart slow cooker. Stir. Cover and cook on low for 8 hours.
Step 2
Add the olive oil. Use an immersion blender or blend the soup in batches in a standard blender until smooth.
Step 3
Garnish with bell peppers and basil before serving.