In a large pot of salted boiling water, cook the whole wheat pasta according to package instructions until al dente. Drain and set aside, reserving 1/2 cup of the pasta water.
In a large skillet, heat the olive oil over medium heat. Add the diced chicken and season with salt, pepper, and Italian seasoning. Cook until the chicken is browned and cooked through, about 6-8 minutes.
Push the chicken to one side of the skillet, then add the minced garlic and broccoli florets. Sauté for 2-3 minutes until the broccoli is bright green and tender.
Stir in the cherry tomatoes and pour in the chicken broth. Bring the mixture to a gentle simmer for about 3-5 minutes.
Add the cooked pasta to the skillet. Toss everything together, adding reserved pasta water as needed to create a light sauce. Sprinkle with crushed red pepper flakes if using.
Taste and adjust seasoning with salt and pepper. Serve warm, garnished with grated Parmesan cheese.
Notes
Feel free to add more vegetables or adjust the spice level to your preference.