Luscious Lamb Lasagna with Eggplant and Spinach

6 Lasagna noodles, broken in half Ask a question about this ingredient

1 ounce butter Ask a question about this ingredient

2 ounces olive oil Ask a question about this ingredient

1 cup onion-small dice Ask a question about this ingredient

3/4 pounds ground lamb Ask a question about this ingredient

1 shallot-small dice Ask a question about this ingredient

1/2 pound eggplant-pealed, chopped in small dice Ask a question about this ingredient

7 sprigs thyme-leaves only Ask a question about this ingredient

1/2 bunch spinach, chopped coarsely Ask a question about this ingredient

1 egg Ask a question about this ingredient

8 ounces ricotta cheese Ask a question about this ingredient

1/4 cup parsley leaves, chopped Ask a question about this ingredient

3 cups Parmesan cheese Ask a question about this ingredient

1 cup Gruyere cheese Ask a question about this ingredient

6 ounces good canned tomato (San Marzano) Ask a question about this ingredient

salt to taste Ask a question about this ingredient

pepper to taste Ask a question about this ingredient