Vegan Sausage and Sweet Potato Bake

Name: Vegan Sausage and Sweet Potato Bake
Cuisine: American
Ingredients: 1 tbsp olive oil; 6 veggie sausages, quartered; 1 large red onion, peeled, halved and cut into wedges; 2-3 slices butternut squash, sliced into chunks; 1 sweet potato, peeled, halved and sliced; 1 large carrot, peeled and sliced; 1 red pepper. deseeded and cut into chunks; 1 tsp thyme; Salt and pepper; 750ml/3 cups onion gravy