Skillet Veggie Lasagna

Bahan-bahan (4 porsi)

• 1 tablespoon olive oil
• 1 small white onion, diced
• 1 small carrot, peeled and diced
• 1 small red bell pepper, cored and diced
• 1 small zucchini, diced
• 4 g arlic cloves, minced
• Kosher salt and black pepper
• 8 whole uncooked lasagna noodles, each broken into 3-4 pieces
• 1 (24-ounce) jar good-quality pasta sauce
• 1 (15-ounce) can crushed tomatoes
• 1/4 teaspoon crushed red pepper flakes
• 1/2 cup ricotta cheese
• 4 ounces mozzarella ball, torn into pieces (or 1/2 cup shredded mozzarella)
• toppings: shredded fresh basil leaves, grated Parmesan, extra crushed red peppers