Inside-Out Lasagna Recipe | Say Mmm

Ingredients

• 8 ounces whole-wheat rotini or fusilli
• 1 tablespoon extra-virgin olive oil
• 1 onion, chopped
• 3 cloves cloves garlic, sliced
• 8 ounces sliced white mushrooms (about 3 1/2 cups)
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground pepper
• 1 14 ounce can diced tomatoes with Italian herbs
• 8 cups baby spinach
• 1/2 teaspoon crushed red pepper (optional)
• 3/4 cup part-skim ricotta cheese