Step 1
Boil the pasta in salted water until al dente. Drain and reserve 2–3 tbsp pasta water. Lightly steam or sauté the vegetables for 3–4 minutes.
Step 2
Melt butter in a pan. Add flour and cook for about 1 minute on low heat. Gradually whisk in the milk until smooth and lump-free. Cook until the sauce thickens.
Step 3
Stir in cheese, oregano, herbs, black pepper, and salt. Add the cooked vegetables and pasta. Toss well.
Step 4
If needed, add reserved pasta water for a silkier sauce.
Step 5
Serve hot with a sprinkle of herbs and extra pepper.