Lucie'S Lasagna

Ingredients

• About 5 tbsp. extra-virgin olive oil, divided
• 2 cups finely chopped onion
• About 1 1/2 tsp. kosher salt
• 1/2 cup white wine or water, divided
• 1 pound fresh spinach leaves (from a 1 1/2-lb. bunch) or 2 cups thawed frozen spinach
• About 1 tsp. freshly ground pepper
• 1 pound mild Italian pork sausage
• 8 garlic cloves, minced (about 3 tbsp.)
• 1 qt. good-quality canned crushed tomatoes, such as San Marzano or Muir Glen
• 16 short, wide dried lasagna noodles or 20 long, thin ones
• 12 ounces eggplant (from 1 small) or summer squash, very thinly sliced
• 1 1/2 cups (12 oz.) good-quality ricotta cheese, drained, or 4% or whole-milk cottage cheese, drained
• 1 large egg
• 1 large bunch basil (2 oz.), leaves rinsed and dried
• 12 ounces fresh water-packed mozzarella balls (such as ovoline), thinly sliced
• 1 large jalapeno chile, thinly sliced
• 1/4 pound dry salami, very thinly sliced
• 2 cups freshly and coarsely shredded parmesan cheese