Prepare the vegetables. Finely shred the red cabbage. Grate the carrot, thinly slice the bell pepper and cucumber, halve the tomatoes, and slice the avocado.
Make the dressing. In a small bowl, whisk together the hummus, olive oil, and cold water until smooth and creamy. If necessary, add more water, 1 teaspoon at a time, until the dressing is thin enough to drizzle. Taste and season with salt and black pepper if needed.
Assemble the bowls. Divide the cabbage, carrot, bell pepper, cucumber, tomatoes, and avocado between two serving bowls. Arrange the vegetables in separate sections.
Finish and serve. Drizzle the hummus dressing over the vegetables. Garnish with fresh mint and serve immediately.