Baked tuna macaroni alfredo verde

Ingredients

• 2 cups whole wheat elbow macaroni
• 2 Tbsp canola oil
• 1 onion, finely diced
• 1 can albacore tuna, drained
• 1 jar Newman's Own Alfredo Pasta sauce
• 1 ½ cups spinach, finely chopped
• 1 cup freshly grated parmesan cheese
• salt and pepper
• ½ whole wheat bread crumbs