Cook the pasta in salted boiling water according to package instructions until soft. Drain and set aside.
In a large skillet, heat the olive oil over medium-low heat.
Add the diced carrot, pumpkin, and zucchini. Cook gently for 6-8 minutes until the vegetables are soft.
Add the peas and cook for another 2-3 minutes.
Optional: Add the minced garlic at this stage and cook for 30 seconds, if using.
Add the cooked pasta to the skillet and toss gently with the vegetables.
Season with salt and optional black pepper.
Sprinkle with parsley and grated cheese if desired.
Serve warm.