1. Heat water in a large pot. Add onions and cook over medium-high heat, stirring frequently until onions are soft (4-5 minutes).
2. Add undrained tomatoes, garlic, bell pepper, potatoes, and seasonings and bring to a simmer. Cover and cook until potatoes are tender (20-25 minutes).
3. Stir in peas and cook until heated through (2-3 minutes).