Vegetable Lasagna

Ingredients (16)

• 1 1/2 tablespoons extra-virgin olive oil
• 1 small sweet potato
• 2 red bell peppers
• 1 small red onion
• 1 medium zucchini
• 1 teaspoon dried basil
• 3/4 teaspoon kosher salt
• 2 (24-ounce jars) good quality tomato pasta sauce
• 2 teaspoons balsamic vinegar
• 1 (10-ounce) package frozen spinach
• 1 (15-ounce) container part-skim ricotta cheese
• 2 cups freshly grated melty Italian cheese
• ½ cup freshly finely grated Parmesan cheese
• 1 large egg
• 9 oven-ready (no boil) whole wheat lasagna noodles
• Fresh basil