I love this idea. Can you suggest any other lighter toppings that would go with it (less rich)? Thanks!

One of my favorite Meatless Monday dishes is Crisped Polenta Squares with Tomato Sauce and Sauteed Mushrooms. A dab of fresh ricotta or burrata is a tasty garnish.

I am not sure what your idea of less rich is--the tomato-walnut tapenade is not at all my idea of rich. But you can use a simple tomato sauce on polenta, or top it with sauteed rapini or some other sort of greens. Polenta can adapt itself to a wide variety of toppings. Your imagination is the limit.