Slices your peppers and onions into strips, then toss in a bowl with half the olive oil. Season well with sea salt and pepper, then spread them out amongst ½ of the sheetpan.
Slice the potatoes into thin wedges then toss in a bowl with the rest of the olive oil along with the garlic powder, onion powder, thyme and some salt and pepper.
Layout the potato wedges across the other half of the pan keeping sure that no slices are touching so that they will crisp up properly.
Place the sausages in a line up the middle of the pan between the potatoes and veggies creating a bit of a wall between them.
Place the sheet pan in the oven, and cook for 30-35 minutes stopping once halfway through to give everything a flip.
Notes
The peppers and onions release a lot of liquid when cooking. To make sure that the potatoes get crispy, line up the sausages like a wall between the peppers and the potatoes.