1.Preheat oven to 220°C (200°C fan-forced). Grease and line a large baking tray with baking paper.
2.Arrange potato, pumpkin, parsnip and carrot on prepared tray; drizzle with oil. Season with salt and pepper; toss to coat. Bake 15 minutes. Add zucchini; bake for 15 minutes or until veggies are tender
3.Make fondue: Melt butter in a medium saucepan over moderate heat. Whisk in flour. Gradually add milk, whisking until smooth. Cook and stir over heat for 3-4 minutes or until sauce boils and thickens. Remove from heat.
4.Stir in mustard and cheese, in batches, until smooth. Serve fondue in a heatproof serving bowl. Serve with vegetables and toast.