Preheat grill or grill pan over medium-high heat.
Bring a large pot of salted water to a boil over high heat. Add pasta and cook until al dente, about 8 minutes; drain and set aside.
Lightly brush all sides of each vegetable with 1 tablespoon of olive oil; place on grill or grill pan, season with salt and pepper and grill for 3 minutes per side.
Transfer to a cutting board and cut into bite-size pieces. Add remaining olive oil to a large skillet over medium heat.
Add garlic and crushed red pepper flakes; saute for 1 minute. Stir in pasta and chopped vegetables; toss. Transfer to a serving dish and serve immediately.