Peel and shred the carrots. Slice the tops off of the broccoli and the cauliflower into very small pieces. Slice the green onions.
Spread about 2 tablespoons of hummus onto a tortilla in a thin layer. Sprinkle another thin layer vegetables on top. Starting from the bottom of the circle, tightly roll the tortilla. Cut the roll into 6 or 8 pieces. Spear with toothpicks.