Vegetarian Pumpkin Spinach Chili

1 (28 ounce) can diced tomatoes

1 (14 ounce) can 100% pure pumpkin

1 cup vegetable juice

1 cup chopped okra

1 cup chopped broccoli

1 carrot, peeled and chopped

1 small zucchini, diced

1 small onion, diced

2 tablespoons pumpkin pie spice

2 tablespoons white sugar

2 tablespoons white vinegar

1 teaspoon chili powder, or to taste

1 teaspoon salt

½ teaspoon ground black pepper

1 (12 ounce) package vegetarian ground beef crumbles

1 (19 ounce) can fava beans, drained

2 cups chopped spinach