Heat oil in a medium saucepan over medium-high heat. Add onion and next 5 ingredients (onion through garlic); sauté 3 minutes. Add Garden Brown Sauce and marinara. Reduce heat; simmer 15 minutes, stirring occasionally.
Place a large nonstick skillet coated with cooking spray over medium-high heat. Add the cubed eggplant, and sauté 5 minutes or until eggplant is lightly browned. Add the onion mixture; reduce heat, and simmer mixture 10 minutes. Serve over linguine, and sprinkle with cheese.