COOK chili in a small saucepan until fully heated through. Keep hot until ready to use.
PREHEAT grill to medium-high heat and brush grates with oil.
GRILL sausages until the exterior is crisp and char marks appear, about 5 to 6 minutes per side.
GRILL rolls, split-side-down, until lightly toasted, about 1 to 2 minutes.
SERVE grilled sausages in toasted rolls and top with chili, cheese, bacon, barbecue sauce, mustard and green onions.