Lasagna without sage

8 lasagna noodles 1 tablespoon olive oil 1 (10 ounce) package frozen chopped spinach 2 tablespoons thinly sliced green onion 1 pint part-skim ricotta cheese[...]

1/2 cup butter 1/3 cup flour salt pepper 3 cups milk 1/4 cup chopped green onion 1 teaspoon lemon juice 12 lasagna noodles, cooked 1 (8 ounce) package frozen[...]