Creating this delightful Vegetarian Three-Bean Chili is simple when you follow these easy steps:

1. Heat the Oil: In a large pot, heat the olive oil over medium heat.
2. Sauté Vegetables: Add the diced onion and garlic, cooking until softened, about 3-4 minutes.
3. Add Bell Pepper and Carrot: Stir in the bell pepper and carrot, and cook for an additional 5 minutes until they begin to soften.
4. Incorporate Zucchini: Add the diced zucchini and continue cooking for another 3-4 minutes.
5. Add Beans and Tomatoes: Stir in the black beans, kidney beans, pinto beans, crushed tomatoes, and vegetable broth.
6. Season the Chili: Sprinkle in the chili powder, cumin, smoked paprika, salt, and pepper. Mix well to combine all ingredients.
7. Simmer: Bring the chili to a boil, then reduce heat and let it simmer for 20 minutes, stirring occasionally.
8. Adjust Seasoning: Taste and adjust seasoning as needed, adding more salt, pepper, or spices if desired.
9. Serve: Remove from heat and let cool slightly before serving.

This step-by-step guide will help you prepare a delicious and satisfying Vegetarian Three-Bean Chili with ease.