1.Combine pumpkin, potato, zucchini, capsicum and leek on large baking paper-lined baking tray. Add rosemary, cumin seeds, garlic and oil, toss until combined.
2.Bake, uncovered, in moderately hot oven, about 45 minutes or until vegetables are browned lightly and tender, turning occasionally. Drizzle with vinegar.
3.Meanwhile, crumble fetta into small bowl. Add ricotta, stir until smooth. Serve vegetables with cheese mixture.
Soft fresh goat cheese can be substituted for fetta, if desired.