Vegan Sausage Casserole (with Frozen Sausages)

Ingredients

• 1 tablespoon olive oil
• 2 medium red onions, peeled and thinly sliced
• 1 red pepper, deseeded and thinly sliced
• 1 yellow pepper, deseeded and thinly sliced
• 4 cloves garlic, finely chopped
• 2x 14 oz (400 g) tins plum tomatoes
• 1¼ cups (300 ml) vegan stock
• 1 teaspoon smoked paprika
• 1 teaspoon dried sage
• 1 teaspoon dried rosemary
• 3 bay leaves
• 2 tablespoons tamari or soy sauce
• 1x 14 oz (400 g) tin borlotti beans, drained
• 8-12 frozen vegan sausages ((to provide 2 or 3 per serving – see notes))
• 1½ cups (100 g) sliced greens ((such as kale, collard, or spring greens))
• Small bunch fresh parsley, chopped ((optional))
• Salt
• pepper