Preheat your oven to 200°C (400°F).
This temperature works perfectly for roasting.
Line your roasting tray with foil.
This makes cleanup much easier later.
Cut potatoes into bite-sized chunks evenly.
Slice peppers into thick strips lengthwise.
Cut onions into chunky wedges carefully.
Keep pieces similar in size.
This helps everything cook at once.
Put vegetables in your roasting tray.
Drizzle olive oil over them generously.
Sprinkle herbs, garlic powder, salt, and pepper.
Toss everything together with your hands.
Make sure vegetables are coated evenly.
Place sausages on top of vegetables.
Space them out evenly in tray.
This helps them brown on all sides.
Add fresh rosemary sprigs between sausages.
Put tray in your preheated oven.
Cook for 35-40 minutes total time.
Turn sausages once halfway through cooking.
Check that sausages are golden brown.
Vegetables should be tender when pierced.
Remove tray from oven carefully using mitts.
Let it rest for 2 minutes.
Serve directly from the tray if desired.
Enjoy this delicious one-pan meal hot.