In a large skillet, heat 1 teaspoon of vegetable oil over medium-high heat. Add the carrot slices, onion, and bell pepper; sauté for 5 minutes.
Add the remaining teaspoon of oil, the broccoli, the cabbage, and the vegetable broth. Continue to sauté until the vegetables are done to your liking, about 10 minutes for tender-crisp.
Season to taste with salt and pepper. Stir in the chopped mint.
Nothing fancy, just a burst of minty freshness with each bite.