Flavorful marinara sauce simmers for just a few hours. Right before mealtime, toss in the shrimp to cook quickly. Serve over hot spaghetti for a delicious weeknight dish that feels dressed up. —Sue Mackey, Jackson, Wisconsin
In a 3-qt. slow cooker, combine the first 9 ingredients. Cover and cook on low for 3-4 hours.
Stir in shrimp. Cover and cook on high 15-25 minutes, just until shrimp turn pink. Serve with spaghetti. Sprinkle with cheese if desired.