Boil the tortellini. Bring a large pot of salted water to a rolling boil. Cook tortellini according to package directions until just al dente . Don't overcook—mushy pasta is sadness.
Cool it down. Drain and rinse briefly under cool water to stop the cooking. Shake off excess water. Toss with 1 teaspoon olive oil so it doesn't clump.
Make the dressing. In a large bowl, whisk together olive oil, balsamic, Dijon, garlic, honey, salt, pepper, and red pepper flakes. It should taste bright and slightly punchy; adjust salt/acid to your vibe.
Prep the goodies. Halve tomatoes, drain mozzarella pearls, and tear basil into bite-size pieces. Zest lemon if using. Toast nuts in a dry pan until fragrant, 2–3 minutes.
Toss like a pro. Add tortellini, tomatoes, mozzarella, and basil to the bowl with dressing. Fold gently until coated. You're dressing pasta, not mixing concrete.
Finish. Sprinkle lemon zest and nuts on top. Taste and adjust seasoning—more salt, a splash more vinegar, or a drizzle of olive oil if needed.
Serve. Enjoy slightly warm or chill 20–30 minutes for flavors to mingle. Either way, it's a flex.