1/4 cup extra-virgin olive oil
1/4 pound pancetta, diced
2 large Spanish onions, diced
Kosher salt
4 large cloves garlic, smashed and chopped
4 28-ounce cans whole San Marzano tomatoes
Kosher salt
1 1/2 1-pound boxes lasagna noodles
1/4 cup extra-virgin olive oil
1 pound bulk Italian sausage
4 cloves garlic, smashed
2 pinches red pepper flakes
1 12-ounce package cremini mushrooms, stemmed and sliced
1 zucchini, halved lengthwise and cut 1/4 inch thick diagonally
2 cups ricotta cheese
2 cups grated parmigiano-reggiano cheese
2 large eggs
6 to 7 fresh basil leaves, thinly sliced
1 pound grated mozzarella cheese (about 4 cups)