Heat the butter in a skillet over medium heat until melted. Add the garlic. Cook for a few seconds, and then add the shrimp and cook for 4 minutes. Add the spaghetti and cook until just heated through.
Lay the lettuce on a plate and top with the spaghetti and shrimp. Squeeze lemon juice over the top and garnish with the remaining wedge.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.