Heat olive oil and sauté onion, red pepper & garlic until almost transparent - add basil, oregano & thyme - set aside.
Make a white sauce by melting the margarine, whisking in the flour and allowing it to cook a minute or two. Gradually add milk - cook and stir constantly until mixture thickens a bit; whisk in parmesan and set aside.
Before assembling the lasagna, blot the seafood until dry.
In a greased 9x13 pan, spread a small amount of white sauce to cover the bottom. Lay 4 noodles on bottom, overlapping slightly. Evenly spread 1/3 of white sauce over noodles, followed by half of sautéed vegetables, half of seafood, half of mozzarella cheese and half of ricotta cheese (dot the ricotta on by teaspoonfuls).
Then add four more noodles, overlapping slightly, and press down gently so top looks even. Add white sauce evenly (reserve 2/3 cup of white sauce for top of lasagna), then add remaining vegetables, seafood, mozzarella & ricotta (dotted on by teaspoonfuls).
Top with remaining four noodles, overlapping slightly. Press down again so top looks even, then spread reserved white sauce over, making sure all noodles have been moistened with the white sauce.
Cover with foil and bake at 350 about 40 minutes. Let stand 15 minutes before serving.