Combine butter, onions, bell pepper, celery and garlic and cook until tender. Add 1/2 cup flour. Pour in half-and-half and Velveeta cheese. (Prepare noodles as directed on package). Add shrimp and crabmeat to mixture along with noodles. Spray casserole dish with cooking spray, pour ingredients into dish and bake in oven at 300F for 20-30 minutes.
Cajun Country -- New Iberia, Louisiana