Heat 1/2 tablespoon olive oil in a skilet; add garlic and cook for 20 seconds or until fragrant.
Add sun dried tomatoes and cook for 30 seconds, stirring frequently.
Stir in basil pesto; cook for 1 minute and remove from heat. Set aside.
Carefully remove squash from microwave and let stand few minutes or until cool enough to handle.
Take a fork and peel the spaghetti strands over the prepared pesto; gently stir to combine.
Transfer the squash pasta back into the squash "boats", top with cheese, and put it under the broiler for 4 to 5 minutes, or until cheese begins to melt.
Remove from broiler, drizzle with remaining olive oil and serve.