Preheat oven to 400˚F. In a small bowl combine hot dijon mustard, balsamic vinegar and Italian seasoning. Mix until blended.

Combine all ingredients in a large zip bag and toss to coat evenly.

Line a large baking sheet (with edges) with foil. Spray lightly with cooking spray. Spread all ingredients evenly in a single layer.

Cook in oven for approx. 20 mins or until sausages begin to carmelize and veggies are tender. Stir occasionally to ensure even cooking of sausages.