Clean and slice in 1/4 inch slices all yellow squash. Place sliced squash in large pot and boil in 2 quarts of water. Add 1 teaspoon salt to boiling water and squash.
Peel and dice onions. Saute onions in 1/2 stick of butter while squash is boiling.
Boil squash approximately 30 minutes or until tender. Drain water form squash and place squash in skillet with sauteed onions. Add remaining 1/4 stick of butter.
Simmer 30-35 minutes turning frequently. Serve piping hot. Season to taste with salt and pepper.
