Best Grilled Vegetable Sandwich

Ingredients (10)

• + ½ zucchini, cut crosswise into 1/2-inch slices add to pantry
• + ½ small eggplant, cut crosswise into 1/2-inch slices add to pantry
• + 1 red bell pepper, quartered add to pantry
• ✓ ½ teaspoon salt
• ✓ 1 ½ teaspoons olive oil
• ✓ ground black pepper to taste
• + 1 small whole-grain baguette, cut into two halves and split lengthwise add to pantry
• + ¼ cup basil pesto add to pantry
• + 4 ounces fresh baby mozzarella, sliced add to pantry
• + 2 plum tomatoes, sliced add to pantry