In a Dutch oven, heat oil over medium-high heat. Add onion and pepper; cook and stir until vegetables are tender, 8-10 minutes. Add garlic; cook until fragrant, about 30 seconds. Stir in tomatoes; cook 2 minutes.
Add next six ingredients; bring to a boil. Reduce heat; simmer, covered, 10 minutes.
Stir in spinach; cook until it wilts, about 5 minutes. Soup will be chunky. Serve immediately with additional Worcestershire and hot pepper sauce. If desired, add olives to resemble eyes.