01 -
Start by turning on the oven to 425°F and set the rack in the middle spot.
02 -
On a big, rimmed sheet pan, arrange the onion and bell peppers. Pour some olive oil over them, sprinkle with salt, and mix everything together.
03 -
Place the sausages in spaces between the veggies, then roast for about 30 minutes, until heated through or fully cooked for raw links.
04 -
In the meantime, stir together mayo, mustard, honey, and soy sauce in a small bowl.
05 -
To finish, tuck the sausages into the hoagie rolls, pile on the veggies, and drizzle the honey mustard sauce on top. Serve hot.