Bring a large pot of salted water to a boil and cook the thawed tortellini according to package directions; add the peas during the last 5 minutes of cooking, then drain and set aside.
While the tortellini cooks, heat the olive oil in a large skillet over medium-high heat.
Add the shrimp to the skillet and cook about 2 minutes without moving, then stir; add the minced garlic and continue cooking about 2 more minutes until the shrimp are pink and opaque.
Return the drained tortellini and peas to the skillet with the shrimp. Sprinkle in the salt, dried thyme, and black pepper, then toss everything to coat and heat through.
Adjust seasoning to taste and serve immediately.
Notes
If using frozen shrimp, thaw in the refrigerator overnight or in ice water for about 30 minutes.
Pat shrimp dry before cooking to ensure proper browning.
Swap tortellini for another short pasta like penne or orecchiette if desired.
Finish with chopped fresh parsley or basil if available.
Squeeze a little lemon juice over the finished dish for brightness.