1. Cook noodles al dente, rinse with cold water, drain, and toss with a little olive oil. Put aside and cover to keep soft.
2. Saute onions, peppers, and celery in olive oil for about 5 minutes. Add the pimientos. Set aside.
3. In a large deep skillet, mix together the mayonnaise, celery soup, milk and sherry. Cook a few minutes until well blended, then add sauteed ingredients.
4. Drain and flake the tuna; add to the sauce. Cook for a couple of minutes, stirring gently.
5. In a large bowl, mix the cooked noodles and sauce until well blended. Transfer to a casserole dish and sprinkle with bread crumbs and slivered almonds. Add salt and pepper to taste when served.