This recipe is perfect for tailgating -- start the vegetable mixture at home and grill the sausages at the game.
Mix ketchup, beer, Worcestershire sauce and Marinade Mix in small bowl. Set aside.
Grill sausages on medium-high heat 10 to 12 minutes or until cooked through. Remove from heat; cover and keep warm.
Heat oil in large skillet on medium-high heat. Add onion; cook and stir 5 minutes. Add bell pepper; cook and stir 10 minutes. Reduce heat to medium-low. Add mesquite sauce and sausages. Simmer 3 minutes, stirring occasionally. Serve on hoagie rolls.
Tailgating Tip: Mix onion-pepper mixture and mesquite sauce in disposable heavy duty 13x9-inch foil pan; cover and refrigerate. To reheat, remove cover and place foil pan directly on grill, stirring occasionally. Grill sausages, then add to pan.