Bring a large pot of generously salted water to a boil. Cook the penne according to the package directions until al dente.
Drain the pasta and drizzle lightly with olive oil to keep it from sticking.
Heat the olive oil in a large skillet over medium heat.
Add the garlic, yellow squash, zucchini, asparagus, cherry tomatoes, red onion, sea salt, and black pepper.
Sauté for 3–4 minutes until the vegetables are crisp-tender.
Add the cooked pasta, peas, grated Pecorino cheese, fresh lemon juice, and a pinch of red pepper flakes.
Toss everything together until the cheese begins to melt and coats the pasta.
Stir in the fresh basil and optional tarragon.
Taste and adjust the seasoning if needed.
Garnish with extra basil and serve immediately for the best Easy Pasta Primavera experience.