Heat a panini press (or countertop grill with closable lid) to medium.Remove ends of each small (baby) eggplant and slice in half, cutting end to end. Slice the remaining eggplant in ½ inch pieces and discard any pieces that are mostly skin.In a hot skillet, brown garlic cloves until fragrant and soft. Once cool, mince garlic and add to mayonnaise. Stir in chopped lemon basil to finish the aioli.Spread aioli onto an eggplant slice and top with spinach leaves, tomato slices, fresh mozzarella and pine nuts. Spread more aioli on another eggplant slice and place ontop. Grill until cheese is melted. Serve hot!