Sheet Pan Sausage and Pepper Hoagie's

I had my soon to be on his own son make this for dinner the other night - HUGE HIT!!! And BONUS - SO incredibly easy!!!

Sheet Pan Sausage and Pepper Hoagie's

6 hoagie or sub rolls
3 bell peppers (red, yellow and/or orange), seeded and cut into large chunks
2 red onions, trimmed and cut into quarters
3 tablespoons olive oil
1 teaspoon dried sage
1 teaspoon kosher salt
Freshly ground black pepper
12 Italian sausages (hot and/or sweet)
1/2 cup mayonnaise
1/3 cup ketchup
1/4 cup whole-grain mustard

Preheat the oven to 450 degrees F. Toast the rolls on a sheet pan for 5 minutes. Set aside. Lower the oven temperature to 425 degrees F.

Spread the peppers and onions on the sheet pan. Drizzle with the olive oil, sprinkle with the sage, salt and some pepper and toss, breaking up the onions a bit as you do. Nestle the sausages in and around the vegetables. Bake until the sausages are cooked through and the vegetables are tender, about 30 minutes.
Meanwhile, create your sandwich spread. Mix together the mayonnaise, ketchup and mustard in a small bowl until combined. Set aside.

Transfer the sausages to a cutting board and slice into coins. Spread each roll with as much or as little sandwich spread as you want, then load up with sliced sausage and roasted vegetables.