1/2 cup bottled roasted red sweet peppers, chopped
Potato chips, optional
How to make it
Preheat oven to 375 degrees F. In large saucepan cook noodles according to package directions. Drain; return noodles to pan.
For sauce, in medium saucepan cook celery and onion in hot butter until tender. Stir in flour, mustard, and 1/4 teaspoon black pepper. Add milk all at once; cook and stir until slightly thickened and bubbly, whisking to remove any lumps.
Gently fold sauce, tuna, and peppers into noodles. Transfer to lightly greased 1-1/2-quart baking dish. Top with chips. Bake, uncovered, 30 to 35 minutes or until heated through. Let stand 5 minutes.