Preheat oven to 350 degrees and line roasting trays with parchment paper.
In large bowl, add all vegetables and apple, 3 tbsp olive oil, 1 tbsp maple syrup, salt, pepper and thyme and toss to combine.
Spread evenly on roasting trays and roast for 30 minutes, rotating the trays half way through and tossing the vegetables for even roasting.
Meanwhile, in same bowl whisk together leftover tbsp olive oil, Dijon mustard and and leftover tsp of maple syrup.