layer semi-cooked lasagna noodles with sauted zucchini slices cooked with onion and garlic, thinly sliced tomatoes, cream sauce, and shredded Parmesan cheese. bake for 30 minutes covered at 375 and another 20 or so uncovered. let sit for 10-15 minutes afterword.
cream sauce... half stick butter, flour, 3 cups milk, small container of ricotta cheese, zest and juice of one lemon, salt, pepper, and a bunch of chopped basil...
make roux, add milk and stir until thick. take off heat and add remaining ingredients.