Preheat oven to 375 degrees Fahrenheit. Grease a baking sheet.

Add eggplant slices and brush with olive oil. Bake for 10 minutes; turn over and brush with more oil. Bake for an additional five minutes, until slices are soft and pliable.

Pour three-fourths of the jar marinara sauce into a nine- by 13-inch baking pan.

Prepare the cheese mixture. In a bowl, combine ricotta cheese, spinach, three-fourths of the mozzarella cheese, eggs, garlic, salt and pepper. Place a dollop of cheese mixture onto the edge of each eggplant slice and roll up.

Add rollups to baking pan. Add remaining ricotta mixture in between the eggplant slices. Sprinkle top of rollups with remaining sauce and remaining mozzarella.

Lower oven temperature to 350 degrees Fahrenheit. Cover and bake for 45 minutes. Uncover and bake for an additional 15 minutes, or until cheese starts to bubble.