Step 1

Cook noodles according to package directions. Drain.

Step 2

Heat a large skillet over medium heat. Put oil in the pan and cook the onion and carrot for about 6 minutes or until carrot is almost tender, stirring occasionally. Sprinkle with flour and cook 1 minute, stirring constantly. Gradually whisk in milk, raise heat to medium-high and cook for 5 minutes, stirring constantly with a whisk until slightly thick.

Step 3

Stir in cream cheese, mustard, salt, and pepper and cook 2 minutes, stirring constantly.

Step 4

Preheat broiler.

Step 5

Reduce heat to medium, stir in peas, corn, 1/4 cup Parmesan cheese, and tuna. Add pasta and heat through. Top with remaining 1/4 cup Parmesan cheese.

Step 6

Broil 3 minutes or until golden and bubbly. Let stand 5 minutes before serving.