Grilled Eggplant Parmesan Sandwich - Healthy Living

Ingredients

• 1 large eggplant , (1 1/4-1 1/2 pounds), cut into 12 1/4-inch-thick rounds
• Canola or olive oil cooking spray
• 1/4 teaspoon salt
• 3 tablespoons finely shredded Parmesan , or Asiago cheese
• 1/2 cup shredded part-skim mozzarella cheese
• 4 small pieces focaccia , or rustic Italian bread
• 2 teaspoons extra-virgin olive oil
• 5 ounces baby spinach
• 1 cup canned crushed tomatoes , preferably fire-roasted
• 3 tablespoons chopped fresh basil , divided