Saute onion in butter. Blend ... until melted. Add macaroni, peas, tuna and salt. ... in 2 quart casserole dish and bake at 350 ... until the cheese melts.
Preheat oven to 350. Butter a baking dish. Cook macaroni in boiling water until tender ... cheese. Turn into casserole and sprinkle the remainder cheese ... for about 35 minutes.