Saute onion, carrots, garlic and mushrooms in olive oil until just tender.
2
Steam, drain, and chop spinach
3
Blend spaghetti sauce, oregano, basil and olives into sauteed vegetables and simmer for a few minutes.
4
Blend ricotta, eggs and parmeson together in separate bowl.
5
Layer ingredients in lightly greased 9"X 13" pan, in two layers in the
following order:
Zucchini,
cottage or ricotta cheese mixture,
spinach,
grated cheeses,
pasta sauce