White Sauce Pasta

Name: White Sauce Pasta
Ingredients: 2 cups pasta; 1+1 tbsp butter; 1 tbsp+ 2 tsp olive oil; 1 large onion; 3/4 cup broccoli florets, blanched; 1/2 red bell pepper; 1/2 yellow bell pepper; 1/2 green capsicum; 4 large garlic cloves, minced; 1.5 tbsp maida; 2 cups milk, chill; 3/4 cup heavy cream; 1 tsp oregano; 1 tsp Italian seasoning; 1/2 tsp red chili flakes, adjust as per your spicy; To taste salt; as per taste white pepper powder; 1/4 cup mozzarella cheese; as needed Few strands of parsley